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!

At the end of summer break, Aoki and Ida go watch a fireworks show. Aoki's heart is set fluttering as Ida abruptly shows more interest in romance! When their school cultural festival comes along, there's even a chance for their parents to meet?!