Does anyone know the title

I remember reading this straight hentai smut TT I forgot the title but it was basically about these college students. The first couple was a basic guy and his kind of dense girlfriend and the second couple was these childhood friends and the girl was anemic or something and kind of represented a vampire and she would drink supplements and all of them were really horny lol. If anyone has read it let me know the title cuz I want to read it again