Shuichi Kagaya isn't human. He has an unnatural sense of smell, and can transform into an incredibly powerful beast... of sorts. He does all he can to avoid standing out and being discovered, but no good deed goes unpunished, and his decision to use his power to save a girl spells the end for his quiet life.

Makoto meets a sweet, shy girl named Haruna helping out at the school's athletics festival. He confesses his feelings for her the next time he sees her, and she bluntly rejects him, only to call him later and ask him out herself! The source of all these mixed signals is Haruna's "evil" twin sister, Natsumi. Natsumi is the opposite of Haruna, she's a forward, crude girl bent on taking whatever she can from her twin sister. Makoto is stuck in between Haruna and Natsumi, as they viciously fight over who will win him in the end.

The general plot of the story is that a boy (yes, “he” is a boy) saved a man from outer space and the man turned the boy into a girl by using some kind of alien technology/potion and force “her” to be his wife. Who’s the boy? He's a normal high school student who looks like a girl and is liked by his brother. Who’s the man? He's the prince of one of the most powerful empires in the universe.

High-schooler Saionji has moved into a boarding house with a really cute young landlord named Sakura, who also attends his school. Though it's really near the school, the place is pretty broken-down and all the other tenants are strange women. They include little Hana, who wears costumes in public, a sloppy, lazy teacher, and his slightly uncivilized schoolmate Akira. Living in the boarding house does not help Saionji's reputation at school, but he has a huge crush on the landlord. Will he be able to handle living with all these bizarre women, and somehow win Sakura's heart?

Monsters have suddenly appeared! However, a hero has shown up to save the city and its people from being destroyed!But he isn't just a hero...?A new superhuman hero action series begins!