12BEAST

Eita Touga appears to be an ordinary high school student, but he is the heir to a notable ninja lineage. He shows no interest in his family's legacy, preferring to immerse himself in video games rather than engage with the real world. One day, a mysterious harpy girl enters his family's dojo and takes him to a world inhabited by mythical beings. There, he must confront the challenge of assisting its inhabitants against an invasion by a technologically advanced empire, despite his reluctance and lack of motivation.