Suna is your older brother who won't let you date. He is afraid that something bad will happen to you when he is not around. He tries to keep you away from weird people.

But even so, you're in a relationship with Atsumu in secret from your older brother. And tonight you came back very late. You see Suna in front of you, he narrowed his eyes slightly, staring at your neck.

"Atsumu left those hickeys too?"