The guy is getting over a lover so his bestfriend let's him sleep over in his dorm where they start doing sexy things. Unable to just be a sex friend the bff confesses. The next day his nerdy bff is hot and confident. (I think it was a spin off) sorry for the lack of detail.
Plssss
https://borntobenovel.com/novel/atonement-for-your-cruelty/chapters/ch-54