Maybe this? Thi the setting is at uni http://www.mangago.me/read-manga/hang_out_crisis/
Not either. It was about mainly 3 office workers, one is openly gay, one is a total player and proud of it, the other is quite normal or a virgin (can't remember) ╮( ̄▽ ̄)╭.
The main pairing is with the playboy x the normal (could be virgin). The other pairing is with the openly gay guy and his longtime bf and them wanting to " spice up their married life "
Please help me find this yaoi manga about colleagues who go to a mixer then end up together. The uke is a playboy.