The story takes place in an age where "Ajin" (demi-human), more casually known as "Demi," have slowly started to become accepted into human society. Tetsuo Takahashi is a biology teacher who ends up teaching three such Demi, hoping to understand more about them while also managing to catch their attention.

Minami Shinoda

Kyouko Machi

Kaede Hondo

Hikari Takanashi

Yoko Hikasa

Sakie Satou

Junichi Suwabe

Tetsuo Takahashi

Shiina Natsukawa

Kusakabe Yuki

Lynn

Takanashi Himari

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