A couple who had been married for 20 years and had been sexless for a long time due to their busy schedules of work and child-rearing resumed sex on a night out at a hot spring. Having sex for the first time in decades, the 52-year-old husband discovers his 43-year-old wife's hidden masochistic tendencies. In a doggy-style position, he pounds into her buttocks while pounding her, and the husband's love for his usually demure wife deepens as he sees her become extremely aroused... "The subtle happiness of everyday life comes from a happy sex life between middle-aged people!"