席替えしたら、どうやら後ろの男が俺のこと好きらしい

The story

A simple seat change turns one high schooler's life upside down. Ordinary student Mayama Haru is stunned when he finds a handwritten confession on a worksheet passed around the classroom. Even more shocking, the note is from Asamiya Kosei, the impossibly handsome and popular boy at the center of their class. Certain the confession wasn't meant for him, Haru questions Kosei, only to receive an immediate and unwavering answer: it was written for him. As Kosei's intense affection grows stronger by the day, Haru finds himself swept up by the relentless advances of a boy who has been hiding his feelings for far too long.