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Arms Alchemy

武装錬金

Kazuki Muto is a high school student who dies one night while trying to save a mysterious girl from a monster. He wakes up in his dorm believing it was a dream, but soon a giant serpentine creature attacks him and his sister. The girl, Tokiko Tsumura, reveals that the monster is a homunculus—an artificial being created by alchemists that preys on humans. She revived Kazuki by implanting a Kakugane medallion in his chest, which now serves as his heart.

Tokiko explains that the Kakugane is an alchemical device that can transform into a unique weapon called a Buso Renkin, the only thing capable of destroying homunculi. Kazuki awakens his own Buso Renkin, the Sunlight Heart, a massive lance. Together with Tokiko and her scythe-like Valkyrie Skirt, he is drawn into a war against the homunculi and their master, fighting to protect those he loves.

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