Yo Goesamwol

Former national Taekwondo player Eun-Bi Lee. One day, while in a slump, she quit exercising and was living an ordinary life, she picks up an unidentified black puppy. But... that puppy turned into a human?! What are those ears and tail?! The fantasy cohabitation life of Sam-Wol, a puppy(?) who lost his memory, and Eun-Bi with 999 fighting power!

(Source: Naver, translated)