"Those feelings from back then still remain in my heart..." says 43-year-old Kyoko, who unexpectedly reunites with her former lover at a hot spring inn during a trip with her mom friends. Their chance encounter in the mixed-gender bath brings back a flood of memories. Though she now has a family, her heart still trembles with lingering love. A dramatic struggle unfolds between her guilt toward her family and the reawakened emotions from the past.