Mr. Kasugano

Mr. Kasugano was the husband of Mrs. Kasugano and the father to their fraternal twins Haruka and Sora Kasugano. He and his wife have died in an automobile accident, which leaves their children orphaned.

Background
The anime did not reveal much of their background. It is only shown that he and Mrs. Kasugano have a beautiful apartment in a certain city.

Family

 * Mrs. Kasugano (wife) (deceased)
 * Haruka Kasugano (son/son-in-law)
 * Sora Kasugano (daughter/daughter-in-law)
 * Unnamed/Unborn Kasugano Child (grandchild)
 * Parents or in-laws (mentioned in the series)
 * Kasugano distant family relatives (mentioned in episode 12)

Trivia

 * His first name is not revealed.
 * His family history is not revealed.
 * He was unaware that Haruka Kasugano lost his virginity at a young age because of a sexual encounter with Nao Yorihime.
 * He was unaware that Haruka and Sora Kasugano have fallen in love with each other.
 * He was unaware that their son and daughter shared a kiss when they were playing a childhood game.