At TEN2, an advertising agency, Tokine Amino serves as the secretary of the company president. While preparing for a meeting with a well-known animation company, she takes on the task of tidying up the conference room. However, she soon discovers that she is unable to exit the room after being engulfed in a bright light. To further complicate things, a phantom-like creature, Hacchin, emerges and explains that she must unravel the enigma in order to break free.