Shan's activites

University student Aoi Yamamoto joins the Sake Research society hoping to get a girlfriend and lose ...

...

It’s a trope where a person hurts his partner and later on regrets it.

- It can be the apposite where uke’s the one that hurt seme’s feelings. 
-He may didnt treat him right from the very beginning or they just in a small argument and the seme hurt him by saying something harsh. 
-They may not end up together or have already been together. 
-The uke may just left him or still give him chance. 
It depends on the story  

if u guys have any more suggestions please leave a comment below^-^

...

Looking for a specific BL manga. Uke approached seme with a goal of asking seme a relationship, then the seme who was nonchalant to his relationships agreed. The seme was bothered with uke's attitude towards his fling coz unlike other flings which are possessive and jealous, the uke knows his boundaries as a relationship with no depth. Everyone in the campus knows the seme's rule when asking for him a relationship.

After Rei's parents leave him to live alone in their country house, he meets with his childhood...