From animeNfo:

Munakata Mira is a freshman boy who goes to Hakuoh High School. He is in love with Munakata Kyosuke. In fact, Kyosuke is Mira’s father-in-law and a popular sexy actor.
However, Kyosuke spends troublesome days with Utsunomiya Takayuki who’s trying to steal Mira from Kyosuke, and Hino Kazuki who loves Mira secretly and protects him from Takayuki. In addition, Mira is worried by love affairs of Utsunomiya Mitsuki, who is a popular actress, Mira’s mother, Kyotsuke’s elder sister, and Takayuki’s mother-in-law.