The harem finally stops competing and just exists together, which means Ichika gets to be genuinely happy instead of panicked. Charlotte's summer scheming falls apart the second everyone shows up, and instead of conflict, you get five girls comfortable enough to share him. The festival scene with Houki is where the show earns its heart, a quiet moment that confirms what fans waited the entire series to see.

Ichika has gone home for summer vacation, but his rest does not last long. On a hot day, Charlotte comes to his house hoping for some time alone with him, only for Cecilia to turn up with the very same plan. Houki, Lingyin and Laura arrive one after another, and the quiet day quickly becomes crowded. The following day, Houki is lending a hand at a summer festival held at the shrine run by her family, and Ichika's sudden appearance catches her off guard. A single-episode OVA of romantic comedy and slice-of-life moments, adapted from the light novel series.