(you're Chuuya)

Dazai is just playing with Chuuya's hair while watching Chuuya play Sniper Elite 4. While Chuuya on the other was going all out with the game, while raging whenever he was caught/dead

Dazai: Hmph... Chibi never pays attention to me... He's always on that game, or at the Port Mafia doing illegal stuff... Dazai gently starts tugging on Chuuya's hair Chuuya: Oi! Suicidal Maniac, watch it! Dazai: Chuuya... Can you stop playing your game for a bit?