KOISURU NEKO WA NADERARETAI

Koisuru Neko wa Naderaretai summary:

A popular cat-lover and a brave half-human-half-cat! The beginning of a love of many firsts! A 100% pure and heart-wringing one-sided love!
Kotetsu, a black cat, has a crush on Okazaki, a clerk at a pet shop, and he makes a wish to meet Okazaki. Just as he makes his wish, he was transformed into a human before he knew it! With his ears and tails tucked away, Kotetsu spent his days frequenting the pet shop when, suddenly, Okazaki strikes up a conversation with him...?!