someone.managago.'s manga / #Hurting each other(1)

I fucking love the brother, need a side story of him. Hot sex scenes Uke falls first Red flag/green flag seme / Kinda toxic relationship/ lots of fights and misunderstandings/ Seme wants to stay sex friends but uke loves seme, then uke moves on and seme finally noticed that he likes uke too But uke is hurt and heartbroken so he starts getting cruel/