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We don't have an overview translated in English. Help us expand our database by adding one.

Aika is in love with a handsome teacher she admires, Tonami, while Mizuki tenderly cares for her younger sister. The sisters thought this sweet and bittersweet youth would continue, but… everything changed when Aika confessed to Tonami, saying she would do anything if he would date her! Instead of dating, Aika became obedient to Tonami’s whims, and one day, she found herself surrounded by Tonami’s so-called “friends,” strangers to her. Surrounded by these men, Aika, trembling with fear, was subjected to a hellish pleasure…

Mizuki, who shows a resolute demeanor as the student council president even towards the sexually harassing teacher, Tanabe. Despite feeling a sense of vulgarity from her beloved sister Aika’s uncharacteristic remarks, Mizuki sees her off to extracurricular service activities. However, when Mizuki is summoned by Tanabe, she is shown lewd footage of her sister, and in exchange for the promise to dispose of the video, she agrees to the man’s demands. As she experiences this for the first time, her consciousness begins to melt away, and she trembles with pleasure…!?

Tomoe has nightmares every night where she has sex with a student in the guidance counselor’s office. Today, while she scorns a student who looks at her lustfully, the same guy from her dreams, Nemoto, appears on the scene. Although Tomoe shows her contempt for Nemoto when he calls her to the audio-visual room, she can’t contain her excitement and has sex with him.

Under the promise that he would delete the porn video of her sister, Mizuki has been used and abused at Tanabe’s will for two days. Despite the pill they gave her, supposedly a contraceptive, making her act strangely, Mizuki continued to accept Tanabe. One day, while being taken outside, Mizuki encounters a scene where several female students from her school are having an orgy with numerous men. To her horror, among them is her beloved sister, Aika…

Kyouko brags about being scouted by her childhood friend Souji’s favorite gravure idol. Souji gets angry and rejects her, but one day, he receives a video. It shows Kyouko in a risque swimsuit, taking on her first gravure shoot! In the video, she is at the mercy of the staff, and eventually she moans while saying Souji’s name, being defiled by the hands of a stranger. What will Souji think of this…!?

Since the shocking gravure photo shoot, Kyouko has become strangely seductive, and Souji has also changed… The two have become lovers, and one day Souji invites his friend Segawa to Kyouko’s house for study purposes, but Souji sneaks out saying he has something to do. When they are alone, Kyouko actively invites Segawa out! Souji spies on Kyouko and Segawa getting wild with a hidden camera in the room…?