Airi went to visit her unforgettable ex-boyfriend, only to discover he was unexpectedly married. As she resolved to give up and head home, she found there were no more trains running and not enough money to afford a hotel. With no choice, she tried to stay overnight at an internet cafe, but it was fully booked due to the weekend rush. At that moment, she met Ichiro, who was in the same situation. With their meager funds combined, they decided to share a hotel room together. Here begins the moment their fates cross.