The day before a hot spring trip, Sasaki was suddenly dumped by her boyfriend whom she was about to marry. Despite securing a rare reservation at a popular hot spring inn, his words of breakup left her heartbroken and spirits low. To lift her mood, she invited her friend Kojima, the only one available at short notice. They enjoyed sightseeing together and relaxed in the room with drinks, but Kojima seemed to have a special motive for joining this trip... What unexpected turn of events awaits? What is his true intention?