At the end of summer, Maria Wakatuki returns to her hometown for the first time in five years. Surprised by how much she's matured from city life, memories of their childhood together come flooding back. Having attended the same school from elementary through high school, he feels a mix of nostalgia and hesitation when she suddenly takes his hand, saying, "I need to talk to you." She confesses she's always loved him. Growing up side by side, that affection had gone unnoticed—until being apart made him realize his own feelings for her. Confirming their emotions, they cross the line into passion. That night, he learns the real reason she came back. A bittersweet yet hopeful story, where warm memories intertwine with love that bloomed too late.