Before marriage, Yumi had several partners aside from her boyfriend and was an active, passionate woman. Two months ago, she unexpectedly reunited with a former lover, and being held by him reignited a desire she had nearly forgotten. Yumi decided to invite this man on a journey. The morning after their night of awakening lust, they spontaneously embrace again. What binds them together cannot be explained by mere physical desire. As if realizing this, Yumi begins abnormally craving pleasure throughout the trip.