Kaito Mori knows his time is running out—months, maybe a year—and the only thing he carries with him is a Polaroid that takes pictures meant to be erased. Stuck in a school he no longer understands, he meets Rina, a meticulous girl who bumps into him on the rooftop asking for advice on how to impress Haruto, the ace of the photography club. What starts as casual conversations about trophies and lenses turns into something more: a fragile bond that Kaito doesn’t know whether to break or keep. Amid jealousy, an explosive rejection on a bridge beneath the summer sky, and a box of photos that were never meant to last, Kaito faces the absurdity of living when everything fades away. With Haruto shining and Rina changing, the rooftop becomes their refuge—until the cherry blossoms mark the end.