Me and Daddy (1999)

Original title: ぼくとダディのこと

Naoya has just started working and living on his own. He has never dated a girl, and he's never been in love. Naoya's father is a very busy and talented editor. One day, Naoya happens to see his father in the city. His father kisses the man he was waiting for and disappears into the hotel district. Naoya is shocked to find out that his father is gay...