Kuroneko Kareshi Hatsujoki Kemono No Zetsurin Etchi Ni Gochui

Lena is a college student who keeps getting dumped because her attitude isn't "cute" enough. On her way home from drowning her sorrows after getting dumped yet again one night, she finds a stray black cat. He doesn't seem like he's used to people and tries to resist, but she brings him home with her for some reason. Just when she thought the cat was sleeping next to her in bed, all of a sudden it's gone, but there's some strange man there?!