Fang (2021)

Both shows have a female lead who is older (late 20s/early 30s) who suffer a breakup and then experience a reverse harem situation in which 4 romantic love interests (including the ex) appear. Both have eye candy and a few cringe scenes and focus primarily on finding oneself and new love again.

Lead actress maintain relationships with multiple male characters.
Similarity Between "Peng" and "I Have Three Boyfriends"

Both "Peng" and "I Have Three Boyfriends" explore the complexities of modern relationships in a light-hearted and comedic way. The dramas feature a female protagonist entangled with three distinct love interests, leading to humorous and heartfelt situations. In "Peng", Go Sa-ri juggles her relationships with her ex-boyfriend, a younger admirer, and a charming boss, while in "I Have Three Boyfriends", Kim Ji-eun’s character balances her love life with a younger colleague, an ex, and a charismatic CEO.

The central theme revolves around self-discovery and navigating love in unexpected circumstances. Both dramas highlight the female leads’ personal growth while maintaining the suspense of who they ultimately choose.

Genre Similarity
Both dramas belong to the romantic comedy genre with slice-of-life elements. They focus on love triangles (or quadrangles) with humorous misunderstandings, emotional conflicts, and relatable modern dating struggles.