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Hinowa Tomari is a normal high schooler, until one day he's told that he has to become the wife of a mysterious creature called Kanenogi. This is the start of their newly married life.
Ayumu Amano's childhood friend, Shinta Yamada, is as plain as a guy can be. They're both in the same college, attending the same classes, and Ayumu worries about his clingy friend. One day, the class playboy Hibi, asks to talk to him. Ayumu hopes to get some advice, but it turns out Hibi's swings both ways and has a crush on Shinta! He asks Ayumu to set him up with his childhood friend. Even though he feels somewhat queasy, Ayumu agrees to play matchmaker...!!
Natsume Hilbright, a girl who has just lost her mother. Surrounded by her loving father and friends, she misses celebrating her birthday without her mother. Meanwhile, she happens to meet Jupiter, a boy who claims to be the Prince of the Demon World, and a beautiful girl named Glance, who is said to be his maid.