

User Score
7 votes
Ryo Takatsuki learns that his missing right arm is actually an ARMS nanomachine implant from secret genetic experiments, and alongside fellow test subjects Kei Karuma, Takeshi Tomoe, and Hayato Shingu, he battles the creators of the technology, the Egrigori, to rescue his kidnapped girlfriend Katsumi Akagi.
Status
Ended
Type
Scripted
Seasons
2
Episodes
52
26 episodes
26 episodes

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.

As a prophecy of doom unfolds on the peaceful land of Britannia, a purehearted boy sets out on a journey of discovery — and revenge.