My computer chrast and if lost my list wich was on the computer 🙁 🙁

I am looking for this yaoi manga:

about a guy (who likes to study ) and a guy who sits next to him but is almost every day sleeping

than he desides to follow that guy, and he and up by a disco (bar) and bumps into a guy but his fellow classmate helps him but he says get lost he;s mine

thats how the manga starts

after that the meet in a park and the destroy a sandcastle and rebuild it
the next evening the kiss in that park

i hope somone can help me

mmm.. Isn't it Rinjin wo Aisou ?? 😁