Neko to Mahou wa Kiss de Hodokeru

Boring magic school student Lucas wakes up one morning with cat ears! Unable to resolve the powerful curse by himself, he turns to his childhood friend and student council member, Dylan, for help. Dylan has changed since childhood. He's now cold and arrogant, but something about the situation weighs on his mind. After some investigation, they discover that the only way to dispel the curse is to sleep with a man, and Dylan bluntly offers to do it.

(Source: Renta!)