Kanbe SASAGAWA, a fellow of Daigakunosuke, comes to know that his lord Toshiyuki is in love with Satsuki, his younger sister and Yajuro's wife, and he then confines her in attempt to divorce her from Yajuro.
大学之助の仲間笹川勘兵衛は主君俊行が弥十郎の妻で妹の皐月に懸想してることを知り、夫婦を離縁させようと計略をしかけ皐月を監禁する。