A Good Day to be a Dog

 was a featured Romance webtoon created by Lee Hey; it concluded on January 21, 2020. The original Korean Webtoon premiered on Naver and concluded on May 12, 2019.

Synopsis
''Hana has made every effort to avoid an inevitable family curse... of turning into a dog after her first kiss. Worst of all, the only way for her to break the curse is to get a second kiss. How will that work when Hana's first kiss is with a guy who is deathly afraid of dogs?!''

Hana Han
Hana Han has a curse where she'll turn into a dog if she ever kisses someone. The only way to break the curse is if she gets kissed again by the person she kissed while she is in her dog form.

Seon Jin
He is the man that Hana kissed while she was drunk.

Bogum Lee
The mountain spirit who cursed Hana's family

Yul Choi
Yul Choi is Seon Jin's nephew (later, it was found out that he is actually Seon's cousin). He is the first person outside of Hana’s family that learns she turns into a dog.

Yuna Han
Hana's sister.

Chaea Yoon
A lecture teacher at Hana's school. It is revealed she likes Mr. Jin, but after seeing Mr. Jin with Hana, she discovers his crush on Hana.

Related

 * A Good Day To Be A Dog: Maybe: Interactive Stories which is a visual novel app based on that work.