They are university students? The ML is a pianist who is trying to perfect a love song that goes through the stages of a relationship(puppy love, passion, heartbreak). He has never experienced love so he uses the MC to understand the emotions. Last I remember ML need to learn about heartbreak so he had to break up with the MC.
It’s about two coworkers. It’s either a boss/employee or senpai/kouhai. Uke is quiet & nerdy looking. Seme is cool looking & handsome. They meet & start hooking up. Uke thinks they’re dating but midway through the story he finds out that Seme is a playboy & Uke is just one of his toys. They break up. Uke then has a glow up & moves away. Seme realizes that he was actually in love with him & regrets losing him. I think they end up together. (Not 100% on it)
If you know the manga please let me know!
https://www.mangago.me/read-manga/hina_wa_mitsuiro_no_koi_ni_torawareru/
i feel like this is what you are talking aboutt (=・ω・=)

I’m looking for this BL about a model(ML) & a regular office worker(MC)
Model and MC meet on vacation & have a one-night stand. Then they meet again because the model is gonna do a few shoots to promote a product for the MC’s company. They start sleeping together in exchange for the model doing the shoots. The company the MC works for is shitty & I think it ends with the MC working for the ML company.
is it this? https://www.mangago.me/read-manga/run_away_assistant_manager_ha/
Yes it is! You’re the greatest! Thank you!