Husband and wife Yuya Hoshi and Merii Hoshi run a small hot spring inn called "Hoshi no Yado" in northern Kanto. However, due to economic downturn, their business falls into crisis, forcing them to face closure. For Yuya, this inn is a precious inheritance from his late parents, something he cannot bear to lose. Merii shares the same sentiment, as she was warmly welcomed by Yuya's parents when they were lovers. One day, a yakuza named Kitashima arrives, sent to collect a secret debt Yuya had taken out. Not only does he come to demand money, but he also becomes captivated by Merii's beauty, devising a special plan of his own...