Hina, otherwise known as Guardian Hearts, is sent to Earth on a mission to protect the peace... and with strict orders not to let anyone find out her identity. So when Kazuya accidentally sees Hina transform just when she comes to Earth, he is forced to take her home with him. Because it’s ok to know about a secret identity if you’re family, right? At least that’s what Hina believes! But as if living with Guardian Hearts isn’t troublesome enough, magic girls now seem to be appearing everywhere and revealing themselves to Kazuya! Can Kazuya survive the attentions – and jealousies – of so many girls? One thing is for sure, Kazuya’s days will be anything but dull!

Kei has a secret crush on Yuzuyu, the most popular girl in the classroom. One day, he is attacked by unknown warriors and the one who rescues him is Yuzuyu herself, dressed in a weird costume, claiming that she is his property and that he can do with her as he pleases from now on.

Kaguya is a boy in an all-girls' school for demons [fox spirits, succubi, werewolves, etc]. Being the only human is bad enough, but the added risk of his manhood being discovered makes for silly and unbelievable (deliciously enviable) situations.