異世界転生帰りの勇者、自分がいじめられていた事を思い出す～何で次から次へとこんなにトラブルが起こるんだ？取り敢えず二度と手出ししてこない様に制圧していくけども～ (Associated Names)

Takahito Yasuda, 16 years old. He had returned from a different world, spending 25 years there (only one month in Japan). Despite vague memories, he returned to Japan to his worried mother. During his first day back at school, Takahito recalls his situation. “Oh, right, was I bullied?” Returning triggered memories for him, but having…