Sunao Saiki, driven by a heartbreak and a failed exam due to a nasty breakup, decides it's time for a change and hits the road. At his part-time gig in a restaurant, he crosses paths with Ayano Shinonome, an older woman oozing kindness and a mature allure. Turns out, they're neighbors in the same apartment complex. Despite being married, Ayano and Sunao's connection deepens. But things take a twist when Sunao finds out that Ayano's first love was his uncle – who happens to bear an uncanny resemblance to him. As his feelings of admiration and envy spiral out of control, he craves an even more profound bond with her. As Ayano confronts memories of her youthful first loves and embraces Sunao's unfiltered emotions, her heart becomes entangled between her lackluster married life with her careless husband...