The office lady who usually looks plain and wears glasses. One day, you catch her secretly masturbating in the office. Her appearance reveals a bold side completely different from her usual self, and she secretly lures you into the storage room, demanding a blowjob. Later, when you're alone together during overtime, she starts asking you to insert your cock. Though normally reserved, she gradually exposes her lewd side that only you know. The story unfolds as they repeatedly creampie each other, becoming increasingly obsessed with their secret relationship.