Koneko

Haruka thought she just adopted a cute, innocent little cat, but she couldn’t be more mistaken. Imagine her shock and surprise when she found out that it could turn into THIS boy. He claimed to be a genie at first, then cupid, then a fairy godparent. He said he came into Haruka’s world because he had heard her innermost pleas and he wanted to grant her wish. Whatever he is though, he is obviously far from a normal human being.

To Haru's dismay, he doesn't assume his cat-form all that much and doesn't hide his ears and tail, so she introduces him to people as Wakahisa Koneko, a cosplayer friend she met online.