https://www.mangago.me/read-manga/countdown_to_love/
This one u mean.
So i was reading this i guesss that was shounen ai this young boy can see an clock on the sky after an incident happened on him, and also this other young boy who's mistaken as a clean freak, can also see the clock on the skyyyy. It was like 20+ chapters???? please tell me the title (/TДT)/