Responses
No He didn't
Yes he did. chapter 5 explains it better.
http://www.mangago.me/read-manga/fukurou_kun_to_kare/bt/sa-c005/pg-19/
Read page 18 for the beginning of their conversation.
He fucking did!! he also did that on Chuchun ga chun
did the seme cheated on the uke with that woman or not