New students at Aokisora High School Mishima Haruki and Honda Towa are best friends. Honda oftens stays over at Mishima's house after coming over to hang out.

At a convenience store near their high school, Mishima runs into his classmate Mashiki Miharu, a girl he's recognized since he was little. Though they've never spoken much before, when Miharu accidentally knocks over a bunch of products, Mishima helps her put them back without a word.

Meanwhile, Honda is being avoided by Mihashi Mami, the other class representative...
Each and every irreplaceable moment.
.كلّ لحظة لا تعوّض
Unersetzliche Momente.
a cada momento irreemplazable.
a cada momento irreemplazable.
Des choses irremplaçables,
l’une après l’autre…
Ogni volta...
Cada uma dessas coisas são únicas.
Моменты, все до одного, незаменимы.