What is the plot?

The episode opens with Aki fully committed to her role as Hikaru's bodyguard following the traumatic fight against Amaryllis and her possessed sister. Aki demonstrates her dedication by fiercely protecting Hikaru from attacks by Kagami Group human-Mecha-Ude pairs who attempt to capture both Alma and Hikaru. In one confrontation, Aki engages multiple enemies in combat, defeats them using her Mecha-Ude abilities, and then ties them up in knots to restrain them after the fight.

Aki's protection continues as the Kagami Group persists in their efforts to acquire Alma and Hikaru, but Aki's superior skills prevent any successes. During this sequence, Aki shows her badass prowess, ensuring Hikaru remains safe despite his reluctance to have a bodyguard.

The narrative shifts to a fight scene rendered in 3D animation where ARMS, including Hikaru with Alma, battles Kagami Group forces. The fight unfolds dynamically with Mecha-Ude clashes, showcasing coordinated attacks and defenses between human partners and their mechanical arms.

Immediately after the fight concludes successfully for ARMS, Alma suddenly snaps emotionally. Alma reveals to everyone present that his memories have fully returned due to Amaryllis's words from the previous episode. Alma declares that he does not want to involve Hikaru in these ongoing conflicts any longer.

Alma then runs away from the group and their "home," leaving everyone baffled, especially Hikaru. Hikaru is particularly shocked because he had believed Alma needed him specifically to recover his memories, and that even after regaining them, Alma would stay partnered with him.

Hikaru enters a brooding state, deeply affected by Alma's departure and his own dashed expectations. Aki provides encouragement to Hikaru, motivating him to take action in response to Alma's flight.

The story transitions into a major flashback sequence set in the Meiji era (1868-1912), depicting the original discovery of Alma and his brother Fist by the Kagami siblings, Yakumo and Tsukihito. Yakumo, the brawny sibling, and Tsukihito, the brainy one, locate the dormant Mecha-Ude.

Alma forms a strong bond with Yakumo during this era, developing a deep friendship as they interact closely. The flashback shows their partnership growing through shared experiences and mutual reliance.

Yakumo and Tsukihito attempt to awaken the Ordela, a powerful artifact akin to an All-Spark for Mecha-Ude, central to their plans. The awakening process goes catastrophically wrong, with the Ordela transforming into a destructive force resembling the Hand from Super Smash Bros., decimating everyone in the vicinity.

Yakumo grabs Alma and fights desperately against the Ordela's defense system to protect others and contain the threat. Despite his efforts, Yakumo dies in the failed attempt, his death occurring right after the botched awakening.

This traumatic loss causes Alma to shut down completely, becoming inactive for over a century as a direct result of Yakumo's death and the fresh pain of separation from his best friend. The flashback ends, explaining Alma's current mindset now that his memories have resurfaced.

Back in the present, Alma deals with the unlocked trauma by attempting to skulk away from Hikaru, wrapping himself pathetically in Hikaru's hoodie for concealment. Jun Kagami encounters Alma during this escape attempt.

Jun scoops up Alma and spins him around energetically, treating him like laundry drying on a line. Jun's motivations appear self-interested as he jumps at the chance to attempt derizing--separating from his own Mecha-Ude--with Alma.

Before proceeding, Jun first calls Hikaru on the phone and allows Alma to speak directly to him. This conversation occurs with Alma still in Jun's possession, highlighting Jun's unclear intentions, blending self-interest with possible subconscious goodwill.

Jun spends most of the episode separated from his own Mecha-Ude, as does Kazuwa from theirs, indicating that reversing the derizing process in a planned manner is not overly traumatic. Jun's green hair coloring has mostly faded during this separation, marking a physical change.

The episode concludes with Alma separated from Hikaru once again, mirroring the tragic parting from Yakumo in the flashback, leaving the new story arc open for the second half of the series.

What is the ending?

Alma, overwhelmed by recovered memories of losing his original partner Yakumo over a century ago, runs away from Hikaru to protect him from the same fate, leaving Hikaru heartbroken and brooding as the episode ends on their separation.

Now, let me take you through the ending of Mecha-Ude: Mechanical Arms, Season 1, Episode 7 "You Just Met Me..." in full chronological detail, scene by scene, as the tension builds to its poignant close.

The episode picks up right after the fierce battle with Amaryllis. Alma's expression turns grim as his long-dormant memories flood back--flashbacks reveal the Meiji era discovery of Alma and his brother Fist by the original Kagami siblings, Yakumo and Tsukihito. Alma bonds deeply with Yakumo, the brawny partner full of determination. They attempt to awaken Ordela, the originator of all Mecha-Udes, but the process goes catastrophically wrong. Ordela's defense system activates like a massive, destructive hand, decimating everything. Yakumo grabs Alma and fights back valiantly, but he dies in the failed effort to control Ordela, leaving Alma shattered with guilt and inactive for over a century.

Back in the present, consumed by this trauma now freshly unlocked by Amaryllis's words, Alma snaps during a confrontation right after a poster fight scene rendered in detailed 3D animation. He reveals to Hikaru that his memories have returned and declares he doesn't want to involve Hikaru in these deadly conflicts anymore, fearing Hikaru will suffer Yakumo's fate. Alma bolts away from their home, wrapped pathetically in Hikaru's hoodie as he skulks off, with Jun scooping him up and spinning him in a brief, light moment before he escapes for real.

Hikaru chases after Alma, baffled and hurt--he had believed Alma needed him to recover his memories and would stay partnered even after. Aki, having grown from her own trauma against Amaryllis and her possessed sister, steps up fiercely as Hikaru's bodyguard. She encourages him with a punch to snap him out of it, declaring she'll protect him whether he likes it or not, even tying herself in knots to restrain Kagami Group flunkies after fending them off in badass fashion.

ARMS leader Aljis intervenes cruelly, declaring Hikaru back to being a normal civilian with no place among Mecha-Ude users now that Alma's gone, snatching away the meaning Hikaru found in their bond. Hikaru slumps into a brooding streak, his ordinary life feeling emptier than ever.

The episode closes on this one-sided breakup: Alma alone, guilt-ridden and hiding to shield Hikaru; Hikaru dejected at home or ARMS HQ, pondering clues to Alma's whereabouts like seeking out Fist; Aki steadfast by Hikaru's side, ready to fight Kagami Group's ongoing pursuit of Alma and Hikaru. No reconciliation happens here--the main characters end separated and emotionally raw, with the Kagami Group's human-Mecha-Ude pairs still scheming in the background, heightening the conflict over Alma's fate and the looming Ordela threat.

Is there a post-credit scene?

Yes, episode 7 of Mecha-Ude: Mechanical Arms season 1, "You Just Met Me...", includes a post-credits scene.

In the scene, a shadowy figure is shown picking up the defeated Amaryllis, hinting at her retrieval by an unknown antagonist--speculated by reviewers to possibly be Jun's big brother or another emerging character tied to the Kagami Group's schemes. This brief teaser builds suspense for future conflicts, contrasting the episode's main focus on Alma regaining his traumatic Meiji-era memories of Yakumo's death and his subsequent decision to run away from Hikaru to protect him from further danger.

Is this family friendly?

Based on the available search results, Mecha-Ude: Mechanical Arms Season 1 Episode 7 "You Just Met Me..." is rated 15 and contains the following content advisories:

Profanity and Violence are listed as content warnings for the series. The episode features action combat scenes with high production quality, including fights between characters wielding Mecha-Ude weapons. One character introduced in this episode, Fourte, is described as a 14-year-old wielding a gatling gun-type Mecha-Ude.

The episode also contains emotionally heavy material, as it includes a flashback to a character's tragic past and explores themes of guilt and loss, which may be upsetting for sensitive viewers.

The search results do not provide detailed scene-by-scene breakdowns that would allow for more specific identification of potentially objectionable content beyond these general advisories. For a comprehensive assessment of whether the episode is appropriate for specific age groups or sensitivities, you may want to consult more detailed parental guides or watch a preview yourself.