Akari, 28, has been married for five years. After graduating from nursing school, she married a surgeon at the hospital where she found work. Her husband was later transferred to an affiliated hospital, leaving them working separately. They still get along, but their demanding schedules leave little time together, and their sex life dwindled after the transfer. Repeated rejection broke her confidence, and they have now gone without sex for about two years. Hoping to change the relationship and escape her frustration, she accepts an invitation to travel with a married man.