My New Life as a Cat (2015)

Blurb:
Nao Kazushiro is a normal high school student—until he gets in a traffic accident and winds up in the body of a cat! At first, it’s all fun and games as he gets used to his new feline form, but then the novelty wears off and hunger sets in. Luckily, he’s picked up by Chika, a cute girl his age who gives him food and a home off the streets. Will Nao (now Nyao) develop feelings for her? Or will he wake up in his human body once and for all?

Source: www.anisearch.com/manga/36767