On a cloudy seaside class trip, Isaki makes a promise with Ganta to meet on the beach under the starry sky if the weather clears up.

It’s almost time for summer break! If that weren’t enough to be excited about, the Astronomy Club plans a meteor shower viewing party.

With their chaperone Haya now gone, Ganta and Isaki are left all alone at her grandmother’s house.

Isaki’s parents find out that she and Ganta have been staying all by themselves. Naturally, they demand that Isaki come home right away, but she refuses.