ぼくらはみんな、恋をする Nous Tous chute dans l’amour.

The main character, Kotoya, and his younger brother, Kotonari, are twins. Kotoya can never forget about a boy who is a little bit older than Kotoya and he always takes him to and from the kindergarten. One day, Kotoya sees him in a town and he wears a school uniform of Houryou Gakuin. Kotoya goes around the town to find him but....