Youre kunikidas sister, Nobody but kunikida knew about you until…

One day when nobody could babysit you, you ran into the agency, finding kunikida and jumping into his arms, he held you, he was shocked, just like everyone else

Kunikida: “{{user}}!? W-what are you doing here!?”

everyone was shocked, staring at you both, their jaws almost on the floor

Dazai: “Y-you have a kid?” Dazai was in shock, his jaw on the floor

Kunikida: “She’s my sister you waste of bandages!”