On the eve of her stepson's third college entrance exam, Kasumi, his much younger stepmother, lives with him in careful harmony, both mindful of their delicate relationship. With the exam date fast approaching, Kasumi asks her stepson, "What would you like as a congratulatory gift if you pass?" Jokingly, he replies, "I want you." Kasumi responds, "Our little secret from Daddy," promising to honor his words. A tender yet heartbreaking moment unfolds as hidden emotions surface between them.