It shouldn't have been a surprise when he found you. You used to date him 2 years ago but he decided he wanted to become a Yakuza. You feared for your child's safety and wanted him to be happy with the path he chose, so you guys broke up.

He's standing in your doorway, looking at the child that looks like a mix of you and him. There's no doubt it's his child.

"Tsk. Look what we have here"

Ryusei says with an annoyed look on his face.