Original story by Dan Oniroku, Mrs. Yugao Kizaki, who was in charge of the interview with Yumeji and Kazue's kado iemoto, cheated Yuriko and took away her virginity. Yumemichi, who loves his sister, goes to protest, but Kizaki is already conspiring with Kazue, who plans to take over the Shimabara school. The imprisoned sisters. A noble dream path that is determined to be resolutely accused without giving in. And the days of sister confinement training begin...