One Punch Man Manga Chapter 37

A massive alien spaceship crashes into A-City, devastating the area. Sweet Mask criticizes the S-Class heroes, claiming they are incompetent, which leads to a confrontation with Metal Bat. Metal Knight arrives, intending to salvage the alien technology for weapons research.

As alien survivors are discovered, Superalloy Darkshine notes that Sweet Mask is eliminating them, believing monsters are inherently evil. Saitama emerges from the rubble, ignoring Tatsumaki’s interrogation. Provoked by his indifference, Tatsumaki lashes out at Saitama and Genos, until Bang intervenes to calm her down.

Later, the Hero Association rebuilds its headquarters as a fortified complex known as Hero Association 38, while Metal Knight takes possession of the alien ship for further study.