After enrolling in college in Tokyo, son Tatsuo began enjoying student life while living on his own. Though he hadn't found a girlfriend yet, he focused on making each day fulfilling. However, the unfamiliarity of living alone stirred subtle anxieties, and he often found himself thinking about his mother. One day, when his new girlfriend mentioned wanting to see old photos, he used it as an excuse to return home. Upon his visit, he found himself irresistibly drawn to his mother's mature feminine charm—an allure far deeper and more captivating than anything he'd experienced with his inexperienced girlfriend.