Ran→Sem ~Hakudaku Delmo Tsuma no Miira Tori~ Cries of Agony Arc

Story

This time's theme, plainly put, is 'The Recommendation of Lewdness.' Believe's Lab lecturer 'Kaori Sakaki,' a female instructor devoted heart and soul to 'Yoshimitsu Majima,' the cult's master. She holds as virtue a spirit of total affirmation that can honestly accept all phenomena and emotions. Her overflowing maternal love and H-cup bust leave even the beasts spineless. This installment's sacrificial main dish is 'Anna Ichinose'!! Riko, the older sister who is both Anna's object of admiration and the target of her complex. To surpass that existence, Anna joins 'Believe's Lab.' Each time she accepts the sexual coercion under the name of 'self-liberation' that the cult espouses, the true nature that had lain dormant deep within Anna emerges. Around that time, Riko, who followed Anna and joined too, is also ravished by male attendees. The sisters' separate feelings pass by without ever intersecting. Even standing naked before others... even masturbating... even sucking a penis... even having sex... even being bathed head to toe in the semen she once hated so much—Riko and Anna's resistance fades, and pleasure gains the upper hand. Riko finally makes it to Anna. But there is no trace of her cute little sister; there is only Anna, transformed into a lust-servant sucking away at a male member...!!