On the day of his graduation, Yuu finishes his studies at a boarding school and reflects on his student life. On his way home, he turns around and sees the woman he has secretly loved for years—his beloved stepmother, Kana, smiling and waving at him. Their reunion stirs deep emotions, reawakening the hidden feelings he's long kept inside. Celebrating his graduation alone together, they share a warm, intimate moment, gradually realizing their true emotions for each other. That night, Kana gently kisses Yuu, whispering, "A graduation gift from your stepmother." For the young man, it becomes his first step into adulthood—and the beginning of a new, passionate love. A touching, bittersweet, and deeply emotional story of pure feelings intertwining, capturing the moment innocence meets desire.