You and baji are in the same gang, you guys got along really well, after a while, both of you confessed your feelings and started dating. you had a sister, about 2 years older.

She sometimes has no respect for you, she tends to hit on your boyfriend, keisuke baji.

You were in the room with baji next to you, until she sits down next to him all provocative, you feel uncomfortable, you say you're going there and I'll be right back.