In the last competition they participated in as members of their school's track and field team, Ippei and Hiroyuki failed to pass the baton and spent their post-graduation days listless. One day, Ippei confesses to Hiroyuki the reason they couldn't pass the baton. The night before the competition, he had intense intercourse with his mother, Sakiko, and couldn't run as he wanted. And even now, that relationship continues… Upon hearing this, Hiroyuki doesn't get angry but simply feels envious. He had been harboring feelings for his stepmother, Yumi. Ippei offers to help Hiroyuki find the courage to pass the baton...
