Chained Soldier: Season 1 (2024)

Yuuki Wakura, a recent high school graduate dreaming of becoming a hero, finds himself suddenly pulled into a portal to Mato while walking with two young kids in Japan. The kids and Yuuki run desperately from pursuing Shuuki monsters in the otherworldly landscape of Mato. Kyouka Uzen, captain of the 7th Anti-Demon Squad of the Demon Defense Force, arrives and slays the Shuuki attacking them.

Kyouka explains to Yuuki that only women can eat Mato Peaches to gain superpowers to fight Shuuki, leaving men powerless. Facing more incoming Shuuki, Kyouka proposes that Yuuki submit to her enslavement ability, her Peach-granted power to control slaves. Yuuki agrees out of desperation to survive and protect the kids.

Upon enslavement, Yuuki transforms into a powerful Shuuki-like form with enhanced strength and abilities far beyond normal slaves. He decimates the horde of Shuuki single-handedly, saving Kyouka and the group. Kyouka decides to recruit Yuuki into her squad as their chained soldier and dormitory housekeeper, allowing him to search for his missing older sister Aoba who vanished in a previous Mato mishap.

Yuuki moves into the 7th Squad dorm with Kyouka and meets the other members: Himari Azuma, who has the ability to copy others' powers and is initially hostile to Yuuki; Shushu Suruga, who can enlarge objects and herself; and Nei Ookawamura, who can heal with her tongue. Yuuki begins his duties cooking and cleaning while training his powers under Kyouka's command.

During a mission, the 7th Squad encounters a powerful Unihorn Shuuki, the type that destroyed Kyouka's hometown, fueling her personal vendetta. Kyouka fights fiercely but struggles against its strength. Yuuki transforms via her enslavement and assists, landing critical blows that force the Unihorn to retreat.

Back at the dorm, squad members reward Yuuki's efforts with intimate acts as part of the enslavement dynamic, which embarrasses him but strengthens their bonds. Himari remains distrustful, copying Yuuki's form briefly to test him but warming slightly after he helps in chores.

The squad participates in training exercises against the 6th Squad, led by abusive captain Yachiho Azuma, Himari's older sister. Yachiho mocks Himari and targets Yuuki. In a spar, Himari copies Yachiho's ability but loses control. Yuuki steps in, transforming to protect Himari.

Himari and Yuuki team up in a death match tournament arc against other squads. In their bout against Yachiho's team, Himari copies abilities strategically while Yuuki provides support. Yachiho dominates with her power, but Himari counters by copying Yuuki's form. Yachiho leaves herself open after overextending, allowing Himari to land a decisive blow, but Himari is shot by Yachiho's hidden attack.

Himari wins the match by technicality as Yachiho is disqualified for the illegal shot. Medical teams heal the combatants' injuries using Mato Peach technology. Yuuki and Himari share water in the kitchen, where Himari kisses him as payment for using him as a slave, witnessed by Shushu who reacts jealously.

Shushu and Sahara from another squad get treated for injuries. Suddenly, the 7th Squad dorm is attacked by an army of Shuuki led by the humanoid Shuuki Rairen. The Demon Defense Force squads, including the 6th and 7th, regroup and mount a desperate defense against the overwhelming numbers.

Kyouka and Himari simultaneously enslave Yuuki to maximize his power in the chaos. Yuuki fights ferociously, taking down waves of Shuuki and clashing directly with Rairen, whose strength tests the squad to their limits. The battle rages with squads coordinating attacks, but Rairen proves nearly unstoppable.

During the United Front arc, Tenka Izumo, Supreme Commander of the DDF and Kyouka's adoptive sister figure, arrives with her elite squad including Soar. Tenka's immense power turns the tide, opening a massive hole to consume Rairen. Nei and others promise loyalty and remember past bonds during the fight.

Tenka, Nei, and Kyouka reunite emotionally, growing closer as sisters. As their meeting ends, Tenka asks Kyouka if she can keep Yuuki for her own squad. Meanwhile, Rairen is nearly swallowed by Tenka's hole but is rescued at the last moment by Shikoku, another powerful humanoid Shuuki who has been covertly attacking DDF squads to gauge their strength.

In a war-like escalation, Naon Yuno from another squad recites incantations to bolster defenses. The battle concludes with the Shuuki army repelled, but Coco from the enemy side licks wounds in retreat. Aoba Wakura, Yuuki's long-lost sister, is revealed as a humanoid Shuuki aligned with the enemies, exciting her in a death match context.

Yuuki resolves to confront his past upon seeing Aoba, vowing to uncover the truth behind humanoid Shuuki and the Mato gates. Kyouka steels her determination for vengeance against the Unihorns. The squad returns home, stronger but facing larger threats, with Yuuki's role as chained soldier cementing his place among them.

In the season 1 finale of Chained Soldier, Yuuki finds renewed purpose to fight for Aoba's humanity, Kyouka defeats the Unihorn, Aoba sides with Kyouka and Tenka against Shikoku, Naon and Koko are captured by Shikoku, and the group resolves to continue battling while Himari trains and the girls remain fixated on Yuuki.

Kyouka stands amidst swirling cherry blossoms that morph into roaring flames, her eyes locked on the massive Unihorn towering before her, its horn gleaming under the dim Mato sky as it crushes her friend in a brutal spray of blood and bone, the sound design echoing like thunderous cracks. She channels her power, her body surging with energy, and unleashes a devastating strike that pierces the Unihorn's hide, its body convulsing before collapsing in a heap of gore, Kyouka panting heavily as flashbacks of her past intercut with her present triumph, her face etched with grim determination.

Tenka and Kyouka approach Aoba, who kneels exhausted in the aftermath, her form still bearing the marks of her demonic transformation. Tenka speaks first, vowing to help restore Aoba to her human self when the chance arises, her voice steady and reassuring. Kyouka echoes the promise, extending her hand. Aoba hesitates, glancing at the horizon where threats loom, then nods in agreement to ally specifically with them, refusing to join the broader Demon Defense Force, her expression a mix of wariness and tentative trust as she rises to her feet.

Yuuki watches nearby, his mind racing with a new resolve burning in his chest--to fight not just for survival, but to return Aoba to her original human form, his fists clenching as he commits this purpose silently to himself amid the group's regrouping.

Shikoku's forces strike suddenly, shadowy figures bursting from a portal; they seize Naon and Koko in a whirlwind of chaos, dragging the two struggling girls through the rift despite Yuuki's desperate lunge and the squad's counterattack. Naon cries out as she's pulled away, her body twisting in resistance, while Koko flails wildly, both vanishing into the portal that snaps shut, leaving the air humming with residual energy. Shikoku's voice echoes faintly, declaring their intent to transform Naon and Koko into something far grander than their current states.

Himari stands apart, sweat beading on her forehead after a recent skirmish, gripping her weapon tightly as she vows inwardly to refine her abilities, determined to stand shoulder-to-shoulder with Kyouka in future battles, her eyes narrowing with focused intensity.

Shushu sidles up to Yuuki, her cheeks flushing as she presses close, her obsession evident in her lingering touches and playful whispers. Tenka mirrors this, draping an arm around him possessively, her gaze smoldering with the same unrelenting fixation on him.

The episode closes on the core group--Yuuki, Kyouka, Himari, Shushu, and Tenka with Aoba now tentatively allied--standing together under the Mato skyline, bonds tested but intact, as distant rumbles signal escalating threats from Shikoku.

Yuuki Wakura ends the season motivated and central to the squad, his power as the chained soldier intact and his new goal to save Aoba driving him forward. Kyouka Uzen triumphs over the Unihorn, solidifying her leadership, physically drained but resolute. Aoba Wakura allies selectively with Kyouka and Tenka, rejecting full MDF integration, her fate tied to their promise of restoration. Naon Yuno is captured by Shikoku, destined for forced transformation. Koko Zenibako shares Naon's capture and the same grim upgrade fate. Himari Azuma commits to personal training, poised to grow stronger within the squad. Shushu Suruga and Tenka Izumo remain obsessively drawn to Yuuki, their positions secure in the group.

Yes, Chained Soldier season 1 (2024) features a post-credits scene in at least one episode, specifically referenced in discussions around episode reviews that extend into season 2 context, depicting an ominous event signaling impending danger to key characters. The scene plays after the standard ending credits sequence, which features the full ending theme "CHA∞IN" performed by Maaya Uchida, with visuals tied to the show's Mato Seihei no Slave source material. This teaser builds tension by visually foreshadowing a threat, as forum reviewers note it was intentionally placed there to alert viewers to future peril without resolving it in season 1. No further visual or dialogue details are specified in available episode breakdowns, but it aligns with the series' pattern of using end-credit teases for narrative hooks.

In the first episode, Yuuki Wakura, a down-on-his-luck high school boy skilled only in cleaning and sewing, accidentally enters a Demon City through a gate in Japan. Monstrous Shuuki creatures attack him, but he is rescued by Kyouka Uzen, the stern and beautiful leader of the 7th Unit of the Mato Defense Corps, riding her own giant monster. As they face overwhelming odds, Kyouka offers to share her power with him, but only if he becomes her slave. Desperate to survive, Yuuki agrees. The contract activates intimately when Kyouka extends her finger, and Yuuki licks it, sealing the pact with a visible collar appearing around his neck. Immediately, his body transforms into a massive, muscular humanoid beast form, which Kyouka mounts and rides into battle. Yuuki's mind remains his own, filled with terror and exhilaration as he tears through the Shuuki with raw, destructive power, his heart pounding from the surreal shift from powerless human to monstrous weapon. After victory, Kyouka proposes a permanent slave contract, revealing her power's cost: she must reward her slave with a 'compensation' kiss, her body compelled by magic despite her stoic reservations, leaving Yuuki flushed and nervously aroused as he accepts, moving into the Corps' barracks with her and her squad.

Otherworldly gates to Mato, a dimension infested with killer Shuuki monsters, have appeared across Japan. Within these Demon Cities grow mysterious 'Peaches'--strange, vaguely fruit-like objects that grant unique superhuman abilities, but exclusively to females, rendering males powerless against the threat and relegating them to second-class status. Kyouka Uzen ate a Peach, gaining the ability to transform others into slave monsters under her command. Her squad members, including the minimally introduced three girls in episode 1, possess their own Peach-derived powers. Yuuki, barred from this gift, relies on Kyouka's slave contract for strength, his frustration at male exclusion fueling his determination to prove useful. The worldbuilding leaves the gender restriction unexplained, heightening the erotic tension as powerful women dominate the battlefield and their male slave.

Post-battle, Kyouka's Peach power demands she compensate her slave Yuuki with a mandatory reward to sustain the contract--deep, tongue-filled kisses that her body performs autonomously, overriding her iron-willed control. In the first episode's climax, after Yuuki's beast form decimates the Shuuki, Kyouka pins him down, her cheeks subtly flushing beneath her composed facade as she stirs her tongue vigorously in his mouth, the sloppy, unappealing yet intensely erotic exchange leaving Yuuki dazed, his subconscious desires manifesting through the magic despite neither fully consenting in spirit. Kyouka views it as a necessary duty for her greater mission to eradicate Mato's threats, her internal conflict evident in her averted eyes and clipped commands, while Yuuki grapples with guilty pleasure amid his enslaved status, solidifying his commitment to the harem-like life with the Corps girls.

Kyouka Uzen leads the 7th Unit of the Mato Defense Corps, an elite Amazon Brigade of Peach-empowered women. In episode 1, three squad members receive brief screen time: the squad's dynamics hint at personalized uniforms and powers. Later details reveal Himari Azuma, whose sleeveless custom uniform accommodates her arms transforming into weapons, her aggressive personality shining in combat; Shushu Suruga, energetic and competitive; and Nei Ookawamura, driven by a personal quest to find her missing parents via her Clairvoyance power. They welcome Yuuki into their barracks, their interactions laced with teasing curiosity toward the lone male slave, Kyouka's authoritative presence keeping order as emotional undercurrents of camaraderie and rivalry simmer beneath the surface.

Yakumo Ezo, free-spirited with a midriff-baring custom uniform, wields air manipulation for flight, her whimsical nature mirroring the winds Yuuki poetically compares her to, evoking envy and admiration in him during joint operations. Nei Ookawamura's Clairvoyance stems from her desperate motivation to locate her lost parents, her eyes glowing with focused intensity as visions guide the squad, internal heartache fueling her resolve amid battles. Ginna, a fangirl of the Corps, possesses powers enabling safe competitions among members for her observation pleasure, her bubbly enthusiasm lightening tense moments. These Peach-granted abilities highlight character backstories, with Yuuki's slave transformations complementing them, his growing bonds deepening emotional stakes in the fight against Shuuki.

Chained Soldier Season 1 is not family friendly and is not recommended for children or sensitive viewers.

Potentially objectionable content includes:

Sexual content and fanservice: The series contains frequent sexual situations and suggestive scenarios involving the female characters. While the show reportedly limits overt sexualization as episodes progress, sexual themes remain a core element throughout the season.

Implied servitude and power dynamics: A central plot device involves a character entering into a "slave" relationship with supernatural implications and power imbalances that may be disturbing to some viewers.

Violence: The series features intense action sequences and combat against supernatural creatures, with graphic violence present throughout.

Underage character concerns: The cast includes at least one character who is 11 years old, and reviewers have expressed concern about how younger characters are depicted given the show's overall sexual tone.

Mature themes: The narrative explores complex and dark themes including survival, consequences of supernatural abilities, and societal upheaval in a matriarchal setting.

Language and tone: The dialogue includes intense and dramatic language appropriate to the action-fantasy genre.

Animation quality issues: Some viewers found the blending of CGI effects with 2D animation occasionally jarring, though this is a technical rather than content concern.

The series is intended for mature audiences and parental discretion is strongly advised for any viewing by minors.