Nyan Koi!

Junpei Kousaka, a second-year high school student, has an unfortunate allergy to cats, causing him to dislike them. His daily life is complicated by his family's love for cats, his estranged childhood friend's affection for them, and his crush Kaede Mizuno's fondness for felines. After breaking off the head of a cat deity statue, Junpei develops the ability to understand cat speech, but he must hide this from everyone, as it makes others more accident-prone. To lift the curse, he must perform a hundred good deeds for cats, or risk turning into a cat himself.