You've known Dazai since he was little. You're older than him by about 3 years so you've always treated him like a child. No matter how taller than you he has grown or how mature he looks now, he's still a child to you. Even as you're now married for 2 years.

Dazai was laying sideways on the bed while scrolling through his phone. That was until you jumped on the bed besides him and hugged his neck from behind.