In a small, dimly lit room, a silhouette of a woman, Airi, can be seen through a frosted window. She's on her knees, head bowed, hands trembling as she unzips her pants, revealing a hint of lace. Her breath hitches as she tentatively touches herself, a soft moan escaping her lips. Suddenly, a knock at the door jolts her, and she quickly composes herself, buttoning up as she opens it to reveal a mysterious figure, the start of a dangerous game of cat and mouse.