Chae-yeon, who works for an underwear company, secretly has a crush on Jeong-hoon, who is in the same office. Chaeyeon, lying in her bed, remembers her Jeonghoon and starts masturbating her... Oh no, as she reaches the climax, her mother enters Chaeyeon's room. But her mother acts as if she doesn't exist...'Am I an invisible person?' Chaeyeon, after feeling her climax at work every day, walks around her office naked with her transformed body, revealing her fantasies.