the accidental secluded room, middle-aged boss and wife's female employee, yui hatano.

Yui, a female employee, came back from her honeymoon. In order to clean up the accumulated work, Mr. Abe, the director of Yui, decided to help overtime. At midnight, when they were carrying the papers that had been cleaned up to the bookshop, it suddenly went out of power and the electronic lock in the bookstore was locked and the two men were trapped. After a long period of time, Yui gradually becomes sleepy. When Abe saw the figure, he lost reason and overthrew Yui. Then they were trapped in the locked room every time something happened.