I read a webtoon last week but I really can't remember the title...it was shounen so (or...

I read a webtoon last week but I really can't remember the title...it was shounen so (or yaoi ,I don't remember the tag ) about a person who had to pass a university lesson and couldn't make it and finally he asked help from a person who had gone in a bar dressed with bunny ears and mask..and after that they begun to hang out often ,the other person also helped the brother of the protagonist when he got lost returning from kindergarten..and the protagonist wasn't gay at first but he begun to question himself coz he really liked the other guy...


Which one was it !!?