Ganta and Isaki have experienced lonely nights as they each struggle with sleeplessness. They form a “Nightly Fun Society” using the observatory as a secret base.

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.

Despite starting a part-time job, Ganta hasn’t raised enough money for training camp. But thanks to Isaki staying at her grandmother’s house, their problems are solved.