Boku to Daddy no Koto

Naoya is a first-year office worker who just started living alone this spring. He has never dated a girl and doesn't have a clue about being in love. Naoya's father is a very busy and talented editor. One day, Naoya happens to see his father in town. Surprisingly, his father kissed a man he recognizes and they disappear into a hotel. Naoya is shocked to learn that his father is gay.
(Source: Japanese = dmm.co.jp || Translation = MDL)