Suzu is a 16 year old girl who's never had a boyfriend and can understand what animals are thinking. She finds an injured cat, Noir and takes it home to care for it. The next morning the cat turns into a boy named Noa. There are people who are trying to capture Noir/Noa by controlling the minds of cats and forcing them to attack Suzu and Noa. Noa is determined to stay with Suzu and asks her to have his child.

Cute and child-like high schooler Suzu has an affinity with animals. She wasn't aware of just how much so until the day a large black cat literally falls into her arms! She wakes up after taking the injured cat home to treat its wounds, and finds a naked boy, "Noa" in her bedroom! He claims to be the cat, "Noir".
It appears that someone is after Noir as they are suddenly attacked by cats. Suzu can sense they are being controlled against their will. After their escape Noir/Noa is impressed by her bravery and the fact that she can understand animals--so much so that he asks her to have his babies!
Poor Suzu, what is she to do with this cat-boy who's determined to stay close to her, VERY close? And what of those who are just as determined to get Noir back?