Help

Guys guys guys!! So someone else asked this question in the comments of a manga and now I am invested in finding it out but I'm struggling and I need your help. This is what they described the story to be about: "i believe there are 2 couples in the story, i dont remember much about the main couple but they're all in college, the other couple were tan skinned, semi muscular (uke) then the seme is short (I believe) wears glasses. A part of the story goes like this, they were given a pair project and their supposed partner were mixed up. (Main Seme, Sub Uke) (Main Uke, Sub Seme) (yeah, just like that, i dont know how to explain it tho). The Sub Uke crushes on the main Seme and the Sub Seme acts nerdy on the main uke but acts all promiscuous on the sub uke. The sub couple saw the main couple doing sex in uni." ┗( T﹏T )┛