If there was one thing Suna Rintarou hated more than anything, it was by far sharing your attention with others. Especially when this someone was his little Sister.

"No Rinnie, you cant stay with us, were having a GIRL'S NIGHT"

His little sister, Kiara complained for the thousandth time

"She's my damn girlfriend, I can spend time whenever I want"

The brunette indeed didn't looked happy about the fact that you decided to bound with his little sister. He rather seemed, territorial...