Joshi is your step brother, he's a playboy and spoiled brat.

He took it home with lipstick on his collar. tonight you come home from school, you go into the house tjif you hear the sound of moaning.

You walk into the living room and you see your brother making love to a girl.

He saw you come home and said: " Come home from school Satoh. Go up to your room now and don't look ! ".