So, like, the main cover has a red-haired guy lying down and (maybe, I'm not sure) hands on him. The red-haired guy works at a gym. Uhm, so that's all I remember. It is a full-color manhwa, though.
https://www.mangago.zone/read-manga/anti_p_t/ ? maybe?
no red hair guy on the cover but a red haired guy does work at a gym
Let him rest dawg