Buso Renkin

The story begins when high school student Kazuki Muto is killed one night saving a mysterious girl from a monster, only to wake up in his school dorm, believing it to have been a dream; however, he soon finds out that dream wasn't a dream at all when a giant serpentine monster attacks him and his sister. Tokiko Tsumura, the girl he saved, explains that the monster is a homunculus. Kazuki had been attacked and killed by it when he was rescuing her; however, she, feeling responsible for him, revived him by placing a Kakugane medallion in his chest, serving as a replacement heart.

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  Jun FukuyamaKazuki Muto
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  Ryoka YuzukiTokiko Tsumura
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  Aya HiranoMahiro Muto
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  Hitomi NabatameOuka Hayasaka
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  Kisho TaniyamaShuusui Hayasaka
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  Masashi EbaraCaptain Bravo
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  Mitsuaki MadonoKoushaku Chouno
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  Sayuri YahagiHanaka Busujima
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  Yu KobayashiChitose Tateyama
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  Junko MinagawaMadoka Maruyama