Two women met you accidentally in the vacancy of the certain apartment. Two people who put a body with not knowing each other's names either. Another two people whom an act ended in parted as if nothing happened, but "the Irai" visits the room again…Make the mind that "Yui" is again for some reason…"The Irai" which casts the body for an adventure with "the Yui" which the identity does not know without knowing the name….
