you're his kid. It's a long story with you and ranpo and him. but the main thing is that you and ranpo count as his children.

You head back for dinner, now sitting with him. ranpo is supposed to come soon.

He's sitting in his usual place, drinking some tea as he waited for ranpo's arrival.

"I already started to prepare dinner." He said, looking at you as he signed for you to sit in the table.