The hidden pleasure held by an ordinary-looking wife. The desire concealed within daily life begins to sprout in the form of adultery. Asuka, a seductive married woman (30 years old), seeks solace in an outdoor hot spring at a quiet inn. Four years into her marriage, she and her husband get along very well and often travel together. But after being rejected just once when she initiated sex, her heart gradually turns toward infidelity. That night, seeking pleasure, she meets another man, and her moans echo loudly through the hallway of the lodging. When asked, "What does adultery mean to you, madam?" she replies, "It's a trick to get along better with my husband," a statement that sends excitement racing through the listener.