Noa Eikawa and Masaru are less than two weeks into their relationship. Planning a trip for their first date, they enjoy a fun evening drinking together, but in their rush to head home late at night, they miss the last train. With no other options available, they check into a love hotel—an unexpected turn leaving both flustered. As the anxious Masaru fumbles with the remote to turn on the heater, the bed suddenly begins to shake... What exactly is happening?