This is the continuation of the first series of the same name. The main heroine is Mifuyu’s cousin, Aina. She attends at the same school as Mifuyu. Aina admires and treats Mifuyu like her older sister, in fact she has sister complex. One day, Aina found out about Mifuyu’s little secret about her job and her relationship with their uncle. Aina desperately persuades Mifuyu to open her eyes, but Mifuyu’s answer is contrary to what Aina’s hoped of. When Aina was kid, her mother told her many times how bad her brother is, that’s why she hasn’t dated anyone and respected Mifuyu so much, but to think her beloved cousin would fall to such indecently. Aina decides to threaten them with their sex tape, but will things go they way Aina wants?