Please Help Me Find This Manga

It was a manga, possibly a oneshot? Definitely romance, not sure if it was shoujo. From what I remember, this girl was like the 'school prince' or was handsome enough that girls fawned over her. She didn't want to be princely-like and wanted to wear more cute stuff.

I’m trying to find a manga I read a while ago but forgot the name of. It’s about a reverse trap where the guy dresses as a girl and he seduces a girl. I remember the story starting off as the girl meeting her friends and the guy is there. Somehow he seduces her and reveals he is a guy whilst making out with her in the bathroom. Also the characters are either college students or just regular adults, I don’t remember the girl or guy wearing school uniforms.
Please help me find it, I stood up all night looking for it but still couldn’t find it.

Hi everyone, I've been searching for this manhwa for a while now, please help me find it? It's a straight romance but it's one of those where the female protagonist time travels to her past. She's been living in the regency era but her father goes bankrupt and after all that it's downhill for her and her family, the guy she marries cheats on her, her elder sister marries this rich guy and leaves the protagonist and her other sister to die in poverty, that's when she's about to lose her life when she gets transported back to the point where they're about to go bankrupt. Now the person making them bankrupt is the male protagonist. Now our female protagonist cleverly tries to change the plot but getting a deal with the male protagonist. Later they have a contractual marriage.

I read this manga like years ago but I can’t remember the name or plot all I remember is that there was a age gap and in one of the first chapters the FL’s flip flop broke and older ML fixes it for her

Help find BL webtoon
The MC accidentally witnesses a murder and in panic, told the murderer that he likes him (and that he is a stalker?)
The murderer is actually a hitman I believe, and works as a veterinarian. (He also has a sister who is in the same business?) Very handsome
So basically MC pretends to be madly in love in order to stay alive.

Please help. I've been searching this for weeks