I read this oneshot once, it was really cute, but I read it a long time ago. It was about this girl who was assigned to sit next to this guy in class, and well I don't remember much of what happened but at the end I think she gave him a note that said "Suki", and then he reversed it and it said "Kisu". If you know what that oneshot is, I would really appreciate it!!! Thank you!!!

No Other Path
No Other Way
No Day But Today

It's Kimi no Kachi - You Win.