RIN×SEN + Ran-Sem Cross Mix - Season of Betrayal and Despair

Story

Some years ago. 'Ebihara Urara' was invited to 'Kokudo Academy' as a teacher. When she learned that the many sexual assaults committed there had been orchestrated by her fiance 'Saijo Takayuki,' Ebihara lost herself and began to spend her days drowning in sex. As always, Ebihara shares her skin with 'Hirukawa Keizo,' the principal of Kokudo Academy. After sex, Ebihara lets out a cry of shock at a remark Hirukawa lets slip. Hirukawa says he saw someone who looked like Saijo at the self-development seminar 'Believes Lab.' From that day on, Ebihara throws herself into gathering information on 'Believes Lab.' But finding no breakthrough, Ebihara stands lingering on a swing. A shadow falls over her face, and she lifts it to look up. Standing there are the sisters 'Ichinose Riko' and 'Ichinose Anna.' The two introduce her to Majima Yoshimitsu, who reigns at the top of 'Believes Lab.' Majima Yoshimitsu's room. After thoroughly savoring Ebihara's soft flesh, Yoshimitsu presses the conversation forward in rapid succession. That Ebihara was invited to 'Kokudo Academy' as a teacher. That she suffered sexual assault from the students there. That she was betrayed by her fiance. That she fell into self-abandonment and continued her days of nothing but sex. Yoshimitsu's words contain things only the person involved could know. Having just had her past pointed out, Ebihara deifies Yoshimitsu. Without a second thought, she declares her participation in this seminar. But Ebihara comes to doubt the days that endlessly continue -- free sex that is a seminar in name only. One day, from Riko's mouth, the truth reaches Ebihara's ears. That 'Saijo Takayuki' is a false name, that his real name is 'Kaji Tomoyuki,' and that he currently works as an instructor at Believes Lab. That Ebihara's senior colleague at her workplace, 'Okita Asuka,' is also a member here, and that -- knowing full well Kaji is Ebihara's fiance -- she has been devoting herself to sex with him. A lewd smile plays across Riko's face. She calmly recounts the cruel truth to Ebihara. Ebihara slowly walks into the playing room. Kaji and Asuka, in the midst of sex, notice Ebihara's presence. Startled by Ebihara's eerie bearing, the two let out a faint scream, their legs giving out as they inch backward little by little. Cornered against the wall, they see Ebihara's two feet closing in before their eyes. The corners of her mouth turn up in a smile... but her eyes are utterly expressionless. Completely deranged, Ebihara murmurs to the two. "Be...lieve..."