From Pocket Comics:
Riho has an annoying habit in relationships that means they rarely last. Then she coincidentally meets up with her first love, Mamiya, who she went to middle school with. Riho is genuinely delighted at their reunion, but Mamiya seems to be acting a little strange... This is a (chaotic) romantic comedy about college students with some fairly difficult romantic habits! Can you sympathize with them or not?

Original Webcomic
Official English Translation