Keiya Tomoya, a young man who lost his mother at an early age, is friends with the son of Keiko Hattori. He always treats Keiko with great respect, and she sees him as a well-mannered young man, feeling completely at ease around him. But one day, while her son is away, Tomoya comes over to visit. With only Keiko and Tomoya alone in the house, an unusual atmosphere begins to build. Feeling uneasy, Keiko grows anxious as Tomoya stares at her and confesses, "I've always wanted a mother like you," before moving closer and clinging to her. And then, it finally happens...