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.

Stopping the Warrior Traitor is the only means to save his friends. Kazuki heads to the rooftop and with full force destroys the Restoration Flask, but finds the shattered flask to be empty!

Becoming like Victor, Kazuki is driven by his fighting instinct. Victor leaves the scene, promising to return. Kazuki tries to follow, but thanks to Tokiko's sorrowful cry, he regains his consciousness.

Kazuki and the gang are enjoying the summer, except for Tokiko, who sneaks off to meet with Gota Nakamura, the newly appointed Alchemist Warrior, who informs her of their new mission.

Thanks to the power of the black kakugane, Kazuki is revived. In order to deal with the black kakugane, Kazuki decides to go to the place where Tokiko found it. Tokiko tells Kazuki that she will not leave his side.

Kazuki, Tokiko, and Gota head toward the Newton Apple Academy for Girls, an all-girl boarding school where the black kakugane was originally located. Warrior Chief Hiwatari and his re-extermination squad are pursuing Kazuki but are stopped by Papillon.

Caught in the explosion created by Hiwatari, Tokiko and Gota stray from Kazuki. Meanwhile, the search and destroy team locates Victor and launches a full-scale attack. But the ability of Victor's Buso Renkin to control gravity proves too powerful.

Without speaking a word, Kazuki and Bravo battle to settle the score. Kazuki attacks with his lance, but even that is not enough to penetrate Bravo's Silver Skin. Bravo accepts Kazuki's growth as a warrior and reinforces his will to re-exterminate Kazuki.

Papillon shows Tokiko the new white kakugane he has forged for the sole purpose of reverting Kazuki back to a human being. Then, from the moon above a golden burst of light shines through the night sky. It is the shining of Kazuki's Sunlight Heart!