Wit's manga / #straight seme(18)

Guy sees his best friend of 10 years masturbating while calling his name, he is surprised. But even more surprised that he can't stop thinking about it and it's not a turn off...

Shima starts a new job and immediately doesn't like his new boss. But his boss notices and finds him fun to tease, so he bothers him some more Second couple is a 3-year unrequited love of two drinking buddies from the earlier story

I might have read this before...

Guy thinks his son is gay and so gets drunk being a worried father only to be taken home by a beautiful woman... who turns out to be a man.