hi people, I am looking for a manhwa that I read partially before and wanted to finish it. It's about this girl that has bad grades, and her sister is the top of the school or something. Her sister has a boyfriend who the girl thinks is really nice and all until she finds him to be an ex-deliquent. Then the boyfriend asks the girl to pay him for his dates with the girl's sister. anybody know this manhwa?

Nulla in mundo pax sincera
"Always go too far, because that's where you'll find the truth." - Albert Camus

Is it EXCEL?

ah yes it is. thanks

Nulla in mundo pax sincera
"Always go too far, because that's where you'll find the truth." - Albert Camus