○ Ippei and Hiroyuki are lethargic even after graduating because they were unable to tie their sashes in the last competition they participated in as part of the school's track and field club. One day, Ippei reveals to Hiroyuki why he couldn't connect the tasuki. The day before the race, he had a violent affair with his mother, Sakiko, and couldn't run as expected. And that relationship still continues. Hiroyuki who heard the story is not angry, but just envious. He had a crush on his mother-in-law, Yumi. Ippei asks Hiroyuki to help him tie the sash of courage, but...
