Crazy Love

Contract relationships
The leads hate each other at first, but start to develop feelings
Crazy love is more of a dark comedy, while BTIMFL is more dramatic

Pontifex Rembrary, a character known for his divine powers, gets transported to a new world while fighting a devil. He possesses the body of Woo Yeon Woo, a member of an unpopular idol group, and helps turn the group's fortunes around after a disastrous live performance. With his charisma and divine powers, he becomes popular among fans but faces challenges from his past, contending with strange religious groups and the devil.

Both have similar comedy craziness and characters that pull a role to achieve their goal/revenge. Both are also underrated gems that deserve more views.

Ruri is both hardworking and beautiful. Despite everyone's assumptions, she is inexperienced with love; she has not had a boyfriend in 15 years. What will happen when her world collides with Ryo, who is "perfect in appearance and content" but continues to be shaken?

Both ML had very poor childhood but as adult they are ultra rich.
FLs are kinda personal assistance of MLs.
Both MLs appears very tough from outside but once you got to know them you realize how much of a softie they are.

The pairs have a similar dynamic, and there are a lot of similarities among the male leads..... plus the potatoes!

On the verge of turning 30, Hoshino Rin, a “kind but unfortunate girl who takes care of others”, is at rock bottom, with neither a job nor a boyfriend.

Through her older brother’s introduction, she begins working as a housekeeper for Wakatsuki Iku, a genius programmer. However, the person she is assigned to is the very same “mysteriously insensitive man” who once ruined her marriage prospects. Although their relationship begins with the worst possible reunion, the housekeeping contract eventually comes to include a “romantic partner contract” as well…

A doting love story filled with strong possessiveness, led by an awkward “genius,” begins!