If you know this pls help

Ok so it's a bl (yaoi) where the bottom is a omega and a masochist.and he went to a library to find a book from his favorite author to satisfy his needs,gets talked about by other people then left,went home to relive his needs and then later got asked to babysit a writers daughter, went to the writers house to then find out that he's a sadist but the sadist didn't know he was a masochist,mc takes care of daughter and eventually his wants and needs take control and e quickly tries to relive himself,gets caught by the writer sadist and he helps him relive himself,talks about the collar on the masochist neck and he puts on his clothes then runs away,pls help find I tried to be as detailed as possible