A two-day, one-night trip entangled in the secret affair of three strangers. Amateur wives aroused in every location, from private train compartments to open-air hot springs. 32-year-old Haru, married for three years, suffers from sexual frustration due to a sexless marriage. Meanwhile, 20-year-old newlywed Kana, though childless, has come on this trip behind her husband's back while he's away on business.