This one's gotten more attention recently so you might've read it before : http://www.mangago.me/read-manga/kijima_kun/
But all of that accident and finding out stuff happens at the beginning. Also, chapter 3 of volume 1 starts an arc for a completely different couple, so if you want to just stick with the first couple, you can just read the first two chapters then skip to volume 2~ (〜￣ㅂ￣)〜
Thankyou ٩(๑❛ᴗ❛๑)۶
this is exactly what you described
http://www.mangago.me/read-manga/sailor_danshi/tr/97949/page/55/
Yaoi where uke/seme (could be either) goes out with a delinquent/tough looking boy because of a bet or on accident ? and that person finds out that he didn't really mean to go out with them? Happy ending please (๑•ㅂ•)و✧