After a long and elaborate rivalry filled with pranks and schemes, Aoshi and Rina have finally confessed their feelings and become a couple. For Aoshi, this new, peaceful relationship is a dream come true, but he quickly finds a surprising problem: it's kind of boring. He secretly misses the thrill and chaos of their daily battles.

Just as he starts to question their new dynamic, Rina begins to reintroduce their old rivalry in a new, flirtatious way. Their dates turn into a series of playful challenges, from a contested strawberry on a parfait to a mission to win a grumpy-looking cat plushie from a claw machine. Through these small skirmishes, Aoshi realizes their war was never truly over. It has simply evolved into a different, cuter kind of warfare, and he finds himself more excited than ever for what comes next in their relationship.