Buso Renkin

In an abandoned factory at night, Kazuki Muto dies in an attempt to save a girl from a monster. Or does he? Kazuki wakes up the next morning as if nothing happened.

Tokiko and Kazuki visit the haunted factory where everything began. There, they find the remains of victims and a homunculus incubator. The homunculi made there lodge themselves onto humans and consume them...

A homunculus embryo has lodged itself on Tokiko, and a week remains before she becomes a homunculus. Between bouts of training with his lance, Kazuki and Tokiko search for the creator of homunculus in order to obtain the antidote.

Kazuki and Tokiko search for a student who has been absent from school for the past four days and come across a sickly third-year student who turns out to be the creator of the homunculi...

Evading the homunculus Washio's attack, Kazuki and Tokiko fall back to form a plan. The two devise a series of high-speed attacks, but Washio's natural instinct and warrior experience sees through their plan.

Seeking the antidote, Kazuki goes to Chono's house, where Chono's father tells him he has cut ties with his son. Kazuki heads to the warehouse behind the Chono household, the very place where his ancestor conducted his alchemy research...

Captain Bravo of the Alchemist Army recruits Kazuki to be Alchemist Warrior. Anticipating underground enemy activities within Ginsei City, Tokiko transfers to Kazuki's class, and Bravo becomes the manager of the school dormitory.

Bravo begins training Kazuki to harden him into an Alchemist Warrior. Meanwhile, Tokiko is ordered to safeguard the kakugane originally taken from Bravo's subordinate Alchemist Warrior.

One rainy afternoon, Kazuki comes across two third-year students, school class president Ouka Hayasaka and her younger twin brother and star player of the Kendo Club, Shusui.

Both Kazuki and the Hayasaka twins cannot hide their shock at learning each other's identities as Alchemist Warrior and LXE. But the Hayasaka twins are determined to fight. Kazuki proposes to battle Shusui one on one until Ouka returns from shutting down the school security system

Shusui recalls his earliest memories: being abducted by a woman claiming to be his mother and the days he spent in confinement. The twins grew up never questioning the closed world they lived in.

In the forest outside of Ginsei City, Bravo, Kazuki, and Tokiko decide to infiltrate the LXE hideout and take down the LXE before they can revive the Warrior Traitor, but they find the place empty except for Moonface...

Bravo rages in a seemingly never-ending battle against Moonface, while Tokiko cannot help but question and fear the intense power Kazuki is displaying as he destroys the hordes of homunculi while his friends cheer him on.