"Not in the middle of the day! But tonight, I'm all yours..." One day my life got flipped upside down. Because of my new mom. She's not my real mom. I don't like her. Actually, I hate her. One day my dad said, "I need to tell you something," and brought this woman home. Yukari is beautiful and gentle, the perfect stepmother on the surface. But no matter how kind she is, Yuu can't bring himself to open up to her. Then one day, his father suddenly leaves on a week-long business trip. Left alone together, Yukari begins to close in on her stepson with the seductive charm of a married woman. But what is her true intent...?