Looking for manga

So I'm looking for this (coloured) manga or webtoon where the uke, which has dark hair, is enemployed and he slept on a bench. While he was sleeping another guy put a paper on him that says that they're looking for people who want to work in a gym like moving stuff and cleaning. So he goes and applies for the job. When he starts he accidentally dropped a weight on the seme's arm and the seme said that he was fine at first but after a day or two he tells the uke to bathe him cuz his arm hurt and after that idk ╮(￣▽￣)╭