One night, Chihiro's husband invited his coworker Mikauchi to their home. When they met for the first time, Mikauchi was instantly captivated by Chihiro's voluptuous body, unable to suppress his arousal. Although her husband had abstained from sex for years, he always gave in whenever Chihiro desired intimacy. Realizing this pattern, he hatched a plan to have his wife Chihiro be taken by Mikauchi.