How to Hold His Leash

Not a single day has passed by without Yeonu calling her verbally abusive boss Junhu Kang a "son of a b****". After being cursed out for the millionth time, Junhu turns into an actual dog. What's worse is that Yeonu becomes Junhu's owner, and the only way for him to temporarily turn back into a human is if she touches him. After internally cursing him 317,920 times, Yeonu finally gains the upper hand against her supercilious CEO, who is now an adorable white puppy.
(Source: LINE Webtoon)

Note: the word used is "개새끼". The meaning is "son of a b****", but the literal translation is "dog offspring", which is why Junhu Kang got turned into a dog. An alternative translation that keeps the dog context and the swear meaning could be "son of a dog" or "dog spawn".

Original Webtoon:
Naver Webtoon, Naver Series

Official Translations:
English, French