Tsun Nyan Kotetsu-kun no Yūutsu

Several years ago, Kotetsu of the cat-like alien race Nyanglien, came to Earth as a spy for an undercover investigation.

As if that wasn't strange enough, he was found-out by a human, Nase, who welcomed him warmly and now Kotetsu spends his time living a comfortable day-to-day life―!?

(Source: Ichijinsha, fan translated)

Episode 1: https://ichicomi.com/episode/12207421983458803656