The strongest hero of Tokyo, Ishikawa Kanata, meets a strange ninja girl. She says the world is in great danger in the coming days. Can she prevent the inevitable and save everyone?

Katatsuki Fiercest Suta is a half-Japanese boy studying in high school. He never expected to be transported to another world because of a strange girl he encountered. Due to that girl, he was given a responsibility that would change his life. That responsibility is to save the world from evil for...

It was a rumor. A simple baseless rumor. About a mysterious gachapon. On a cold winter night, Kazuaki Sakamoto, a second-year high school student, was on his way back home after a night shift at his local convenience store. It was then that he encountered, a mysterious gachapon.