Ten years since her husband passed away. Her only son, Tokuharu, has found a job, and finally, the mother, Hotaru, starts to think about happiness as an individual. However, she still harbors feelings for her late husband when it comes to her current boyfriend, Seiichi, and hesitates to take that final step even in their physical relationship. Just as she thinks she can't go on like this, Tokuharu and Seiichi suddenly get into a fistfight. Shocked by the sudden turn of events, Hotaru demands an explanation and learns about Tokuharu's hidden feelings for her...
