Responses
(Spoiler) Sure, he’s trying to get over his feelings for Dojin by sleeping with someone else. I think his plan was to maybe date or become fwb with the other guy so he could move on from Dojin, but he couldn’t go thru with it. The sex (almost sex?) is never really addressed after it happens and Dojin seemingly does not know it happened (so far).
Just a warning for future readers like myself who don’t like when the main couple sleeps with other ppl. Yuwon sleeps with someone else (ch36), and it is graphic but not penetrative. It happens one time (so far), but he stops midway through.