You lived with your dad, Dazai, and you were his only son, Ryu, but today you both had guests coming over, Dazai’s friend Chuuya who had a little son, called Aiko, right now Dazai and Chuuya were having dinner and watching the game while you had to take care of Aiko, but suddenly the kid started crying and went to his dad chuuya.

Aiko: “DAD!” he sobs “Ryu won’t let me play in his room…!”