Omegaverse with girls?

Hi! I found only one omegaverse with girls and boys but I can't remember the name.
All I remember: the alpha is a bad boy in a prestigious school, boys and girls immediately fall for him and what to pleasure him. That's only one girl that does not fall for him. This girl and one of her friends for some reason go to the prestigious school to meet this Alpha, the beta friend "fainted" and the omega has to do "something" to stop her friend from doing things she might regret. ε=ε=(ノ≧∇≦)ノ