"I was hoping I'd finally be able to spend some quality time alone..." While his parents are away on a trip, his mother's friend, Sakiko, ends up looking after him. Masato is not keen on the idea, but as he spends time with her he begins to be drawn to her mature charm. "Please! Quickly close the door!!" Just then, Masato opens the door without noticing that Sakiko is in the bathroom. Excited by the sight of her shameless appearance, Masato chases after Sakiko, who has run into the room, and embraces her tightly...