What is the plot?

Based on the available search results, I can provide a partial plot summary of Chained Soldier Episode 12 "Homecoming, New, Resolve," though the results do not contain a complete unabridged spoiler as requested.

Yuuki discovers a new reason to fight: to return his sister Aoba to her original human form. Aoba has been transformed into a Shuuki and agrees to work with Kyouka and Tenka to help Yuuki, though she refuses to align with the broader Demon Defense Force.

During a confrontation, Shikoku resets the Unihorn's personality and watches as Yuuki and Kyouka fight the creature. Meanwhile, Jouryuu flies away with Naon and Koko, having captured them. The episode includes flashback sequences showing Kyouka's past, including the death of her friend and her battle against the Unihorn, with cherry blossoms transforming into fire as part of the visual storytelling.

The episode features a dinner scene with the entire crew where various character dynamics are reinforced. Kyouka and Yuuki share an overdue reward moment. Himari expresses her desire to improve her abilities to fight alongside Kyouka. Shushu and Tenka continue their obsessive interest in Yuuki.

Before a cave collapses, the group escapes. Yuuki promises to find Naon and Koko. The episode concludes with the team heading out on their next mission, leaving the situation with the captured friends unresolved and setting up future plot developments.

The search results do not provide sufficient detail to reconstruct every beat-by-beat sequence of the episode as comprehensively as your request requires.

What is the ending?

Yuuki Wakura finds renewed purpose in fighting to restore Aoba Wakura to her human form, as the 7th Squad unites with new allies and sets off on their next mission amid unresolved threats.

Now, let me take you through the ending of Chained Soldier Season 1 Episode 12, "Homecoming, New Resolve," scene by scene, as the dust settles from the chaos and the characters forge ahead into uncertainty.

The episode builds to Kyouka Uzen standing resolute after her intense battle flashbacks intercut with the present--cherry blossoms morphing into roaring flames, the brutal crushing of her friend echoing in sharp sound design, culminating in her slaying the Unihorn with unyielding determination, her face etched with hardened grief and unbreakable will as she emerges victorious, bloodied but unbroken.

Cutting to the aftermath, Kyouka, Tenka Izumo, and Aoba Wakura share a pivotal conversation where Kyouka and Tenka vow to help restore Aoba to her original human form when the time is right; Aoba, her expression a mix of wariness and tentative trust, agrees to side specifically with them but rejects alliance with the broader Demon Defense Force, her eyes flickering with guarded hope as the trio solidifies this pact.

Meanwhile, Shikoku forces have captured Naon Yuno and Koko Zenibako, dragging them away to transform them into something far grander and more monstrous than their current states, the girls' faces twisted in fear and resistance as they're pulled into the shadows, leaving their fates hanging in peril.

Back at base, Himari Azuma trains fiercely, sweat pouring down her determined face, pushing her limits to enhance her abilities so she can stand and fight shoulder-to-shoulder with Kyouka, her breaths ragged with ambition and loyalty.

Shushu Suruga and Tenka remain fixated on Yuuki, their gazes lingering on him with obsessive hunger, Shushu watching from a distance with longing pinings while Tenka presses in close, her pursuit unrelenting.

Yuuki, the noble-hearted everyman at the center, receives his customary "reward" from Kyouka in her private room-- she rough-houses him playfully yet with an undercurrent of genuine care, her strong hands gripping him firmly as she shows affection in her tsundere way, their interaction charged with growing mutual feelings, Kyouka's cheeks faintly flushing beneath her stern facade.

The group gathers in a rare moment of unity, all the women treating Yuuki with uncharacteristic respect, acknowledging his value as the MVP who has powered them through battles, their voices overlapping in admiration as they fight over his attention briefly before settling.

Tension rises as two of Aoba's friends remain missing--Naon and Koko--prompting urgency before a cave collapse seals them off; Aoba searches desperately but they escape just in time, the structure rumbling down behind them in a cascade of debris.

The finale crescendos on a cliffhanger with a massive, ominous chicken egg pulsing with otherworldly energy, hinting at horrors yet to hatch, its surface cracking faintly under watchful eyes.

Finally, the 7th Squad mobilizes for their next mission, marching out together; Yuuki turns to Aoba with solemn resolve, promising her, "I'll find your two friends," his voice steady with brotherly determination just before he stumbles and falls flat on his face in classic comedic fashion, the screen fading on their departure into the unknown.

In this close, each main character's fate crystallizes: Yuuki Wakura presses on as the chained soldier, his quest sharpened to save his sister Aoba and now her friends Naon and Koko, ingesting spirits like Rairen and Fukuma that linger within him, bound to the squad's battles with unyielding optimism; Kyouka Uzen hardens further in leadership and budding affection for Yuuki, her resolve now extended to aiding Aoba; Tenka Izumo allies closely with Kyouka for Aoba's sake while chasing Yuuki obsessively; Aoba Wakura sides warily with Kyouka and Tenka, yearning for restoration, her missing friends Naon and Koko captured by Shikoku for transformation; Himari Azuma hones her powers to match Kyouka; Shushu Suruga pines for Yuuki from afar. The squad as a whole hurtles toward new conflicts, unbroken but ever-tested.

Is there a post-credit scene?

No, there is no post-credits scene in Chained Soldier Season 1 Episode 12 "Homecoming, New Resolve." The episode concludes with Kyouka's intense "reward" session for Yuuki, where she roughly wrestles and chokes him out in a playful yet dominant display of affection, leaving him conditioned and exhausted on the floor as she stretches over him possessively, her glowing form and muscular physique emphasizing their bond amid the squad's reflections and farewells. This final moment ties directly into Yuuki's new resolve to fight for Aoba's humanity, with no additional teaser or stinger after the credits roll.

Is this family friendly?

No, Chained Soldier Season 1 Episode 12 is not family friendly due to the series' overall mature themes and content unsuitable for children or sensitive viewers.

Potentially objectionable or upsetting aspects include: - Frequent sexualized depictions of female characters, including suggestive poses, outfits, and interactions with implied rewards involving physical intimacy. - References to servitude and slavery dynamics with power imbalances that could be disturbing. - Intense action violence against monstrous creatures. - Presence of an underage character (11 years old) in a context with sexual undertones from the series. - Overall ecchi tone with fanservice elements like awkward, comedic sexual scenarios.