In this warmhearted romantic comedy, a mistaken identity leads to a blossoming romance between two boys. Aoki has a crush on Hashimoto, the girl in the seat next to him in class. But he despairs when he borrows her eraser and sees she's written the name of another boy-Ida-on it.

To make matters more confusing, Ida sees Aoki holding that very eraser and thinks Aoki has a crush on him!Aoki is dating Ida, a boy in his class. Aoki is shaken when he finds out Ida wants to attend college in Kyoto, so they decide to go to an overnight open-campus event together. Meanwhile, Akkun and Hashimoto make summer plans, but is Akkun ready to meet Hashimoto's parents?