One-Punch Man Season 3

Saitama, a hero with an unorthodox approach to heroism, continues his official duties in the Hero Association alongside Genos. His incredible strength allows him to defeat opponents with ease, but this also renders him somewhat complacent in his role. The Monster Association, a group of powerful beings, becomes a focus of attention when they take a hostage, prompting the S-class heroes to plan a rescue mission.