Ao-chan Can't Wear Silky Panties.At school, Takumi asked Ao to study at his apartment on the weekend. At night, Ao looked through her phone and bought underwear. The package arrived and Hanasaki wanted to get it, but Ao rushed to the door to grab the package. Hanasaki asked her what was inside it, she told him it's for studying. Later, Ao arrived to Takumi's apartment to study. They studied until Ao asked a math question, while Takumi didn't get it. He asked Ao a question about who scores better on the quiz and she thought he wanted to dare her...