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 thought his summer vacation would be quiet and uneventful, but that plan crumbles the moment Charlotte shows up at his house with romantic intentions. Before he can catch his breath, Cecilia arrives with the same goal. Then Houki. Then Lingyin. Then Laura. What was supposed to be a peaceful break transforms into absolute chaos as five girls compete for his attention, each convinced they deserve exclusive time with him. The next day brings no relief. When Ichika attends the summer festival at Houki's family shrine, he finds himself surrounded once again, caught between various romantic advances and comedic misunderstandings. Every moment becomes an opportunity for someone to stake their claim, leading to situations that range from heartfelt to hilariously awkward. This OVA trades the action and mecha battles for pure romantic comedy and slice-of-life antics. It's lighthearted fun that capitalizes on the harem dynamics established in the series, asking not who Ichika will choose, but how he'll survive the summer with his heart and dignity intact.