Responses
I recently read a manga like that but they’re not in three-way relationship.
http://www.mangago.zone/read-manga/akuma_chan_wa_momoiro/
Only one I can think about is this one. I think it happened in the first chapter. Not sure :) http://www.mangago.zone/read-manga/yarisugi_party_night/
Any yaoi threesomes, but there one seme, one uke, and in the middle a seke? (the seke feels in pain and good since hes f***ing a uke and getting f***ed) (๑•ㅂ•)و✧