Nyankoi!
When cat-allergic Jyunpei accidentally damages the statue of a cat deity, he winds up with a catastrophic curse and the ability to understand felines. To make amends, he must perform one hundred cat favors or become a cat himself! Soon every cat in the area is showing up with their list of “requests.” Worse, his huge crush on classmate Mizuno, his scary ex-childhood friend Sumiyoshi and a whole other list of cat-crazy females is making Jyunpei's high school life crappier than a litter box!