Meet Shooto. He's a big hero fan and wants to become a hero! The problem is that he's mocked for being too short. One day, his classmate Mizushima invites him to become a "hero" at her home which is actually a criminal organization called Jackal.
Shooto then gets tricked by Jackal's leader Crea to become their supervillian, Ratman! Now the world's smallest hero will embark on…