Sankarea Vol 7

Sankarea Vol 7 by Mitsuru Hattori. A Romance manga rated Older Teen, published in English by Kodansha in 2014.

Chihiro Furuya is obsessed with zombies and is trying to bring his dead cat back to life. When Rea Sanka, a sheltered girl from a strict family, dies in an accident and returns as a zombie, Chihiro decides to take care of her.