The life of a cyborg, programmed to protect his overprotective older brother and ordered to conceal his identity from his classmates. Part serious, part comedy; plot deepens as it goes on.

While on his way to school to confess his love to classmate Kusanagi Mikuru with a love letter, a second year high school student Takatou Iori gets run over by a truck to save a cute first year elementary sc...

A side story of Mahouka Koukou no Rettousei that focuses on Shiba Tatsuya's younger sister's viewpoint and experiences of the events taking place in the main story.