Kurusu Kimihito is an ordinary guy with a monster-sized problem: Miia, the monster girl! Part snake and all woman, Miia is affectionate and not afraid to show it, and she’s Kimihito’s full-time responsibility thanks to a certain government exchange program. But just when it seems like Kimihito’s hands can’t get any fuller, monster women of all species begin to invade his home!
Hapless Kimihito finds himself sucked into a government exchange program that forces him to become caretaker to Miia, an overly-affectionate monster girl who is part snake.
Just when Kimihito thinks he’s settled in with Miia, two new monster girls arrive on the scene to wreak havoc: Papi, the harpy, and Centorea, the centaur!
The three monster girls are now living under Kimihito’s roof, and just when it seems like tensions can’t get any higher Smith makes a surprising announcement.
Something strange appears in the Kimihito household and quickly makes Miia its first victim. What is this slimy creature, and is it friend or foe?
Agents from the Interspecies Exchange Agency arrive at the Kimihito household and the girls flee with Suu. But the Agency is there for an entirely different reason.
Kimihito finds himself in one uncomfortable position after the other when Miia begins shedding and Papi prepares to lay an egg. A shady director appears to film the ordeal.
Kimihito and company are introduced to “MON,” an unconventional special forces team made entirely of monster girls. A spider woman appears and takes an interest in Kimihito.
Rachnea’s causing issues that might be a product of miscommunication or jealousy - it’s up for debate. Then, as Kimihito gets a cold, the girls must rely on Suu to help him
The girls try to deduce if Smith and Kimihito are on a date but their plan backfires. Even so, Miia gets to go out with her Darling, but it’s not quite what she had in mind.
Papi requests a forest trip, but doesn’t know why until the group is attacked by a tree! Later, Cerea goes out with Kimihito and a devil takes advantage of her insecurities.
MON is sick of watching Kimihito go on his dates with the girls, so they recruit him as their "boyfriend" for the day. Later, the writer of a threatening note is revealed!
According to Lala the Dullahan, Kimihito’s life is in danger. Though he assures the girls that he’s not going to die, their attempts to save him may actually do him in.