i read this one a while back,, but I forgot to save it
the girl and the guy were in a relationship but then the girl suddenly leaves abroad (for school or something? I'm not really sure) and the guy sleeps with literally every girl until she comes back. he didn't have feelings for any of the girls he slept with (he still loved the girl) and when she came back he was angry/mad/surprised but they end up together in the end. the only thing I remember ab the girl was that she had curly black hair that was kinda long.

Kirai?

~4400 manga completed
~1700 ongoing...

ohmygod thank you so much