After a decade since graduation day brought together old friends for a class reunion party—including Saeko's former homeroom teacher—the perfect night was underway. Saeko attended with her husband; he was a fellow classmate from high school. While her husband happily chatted with an old friend amidst the festivities and Saeko mingled with her beloved teacher figure,
he suddenly received a call from his superior about an urgent work crisis. Forced to rush to the office to pull an all-nighter and meet critical deadlines for the company project, he left Saeko alone amidst their growing intimacy. As the reunion wound down and Saeko began feeling tipsy from too much sake,
the teacher took pity on her and escorted her to a nearby hotel room for rest. In that private space, old feelings resurfaced powerfully. The teacher confessed his regret over previously rejecting her heartfelt confession of love and expressed his deep desire to finally make love to her—a first time, perhaps, but certainly his last—to settle that lingering heartache. Their passionate encounter continued relentlessly through the entire night until dawn broke.