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Levius -レビウス-
新生历19世纪 战后的帝都盛行起人体与机械相融合的「机关拳斗」。因战争失去父亲、母亲仍未恢复意识的孤独少年列比乌斯，在收养他的伯父扎克的指导下，开始在机关拳斗的舞台崭露头角……人类的尊严与文明的未来相互碰撞，尖峰对决就此开幕。
Against his trainer's wishes, Levius uses his spin hook on his opponent. Despite the risk of mechanical failure, he wants to keep using it.
Levius's uncle Zack takes him in after his mother is injured during the war. They struggle to connect until Levius shows an interest in boxing.
Malcolm Eden's last five bouts have all ended in his opponent's death. Zack pleads with Levius to forfeit the upcoming fight, but Levius refuses.
Levius is somehow unable to dodge Eden's punches. Natalia and Zack figure out what's going on just in time for the maintenance break.
The hulking Hugo Stratus is Levius's opponent in his promotion bout. While Natalia is upset at being passed over, Bill is suspicious.
Levius recognizes the mark on AJ's armor, and remembers where he's seen it before. Hugo's father urges him to forfeit the match, but he's too proud.
The group visits Clown's residence. When Levius asks AJ if she recalls their first meeting, she insists he's misremembering the events in Greenbridge.
Team Levius prepares for the next fight: Bill fabricates a new arm, while Zack and Natalia help Levius train. Malcolm Eden volunteers to assist.
Levius's new arm fails the first inspection. When Bill's frantic fixes don't solve the issue, Levius proposes a radical and life-threatening solution.
The fight with AJ begins, with both their futures on the line. AJ's inhuman movement and inability to feel pain make her a formidable foe.
The stratagem fails, and AJ returns to the ring. Team Levius realizes she's cheating, but only Zack's desperate choice can stop her in time.
Levius has just one spin hook left; AJ's second steam engine is just below her heart. It may not be possible to both win the fight and save her life.
