Infection: Chain of Lust ~Hitomi Saeki Chapter~

Story

Shiritsu Suzugamine Academy, a classroom after school. The members of the Film Research Club are planning an overnight, two-day training camp during this summer break. Among the members chatting cheerfully, the third-year Tomomi Igarashi looks downcast and lonely. Her classmate and boyfriend, fellow club member Yuji Tanaka, can't attend the camp because he's caring for his hospitalized mother. Buoyed by everyone's encouragement, Igarashi forces a smile and tells them all she'll join. On the first day of the camp, the club members begin watching a movie in the school's audiovisual room. Partway through, noise flickers across the screen, a suspicious audio of a man and woman plays, and the image switches. Projected onto the screen is the coupling of a man and woman. For some reason the voluptuous woman is wearing a skin-tight gym uniform. The woman on screen was none other than the club advisor, Risa Shindo. Covering her face with both hands, Shindo flees the audiovisual room. "No way..." Kato mutters. Amid the dazed members, Takeuchi's eyes glint red and sharp. On the way to go find Shindo, the smirking Takeuchi abruptly holds out a digital camera. He urges Kato to check the data. Uneasy but taking the camera in hand, Kato checks the data. On it, the footage that played in the audiovisual room is reproduced. The man who'd been cut out of frame was Takeuchi. Kato is terrified at Takeuchi's twisted smile. A certain building. An emergency bulletin flashes across a large monitor. A mysterious virus that has suddenly emerged, "UNKNOWN level4." When infected, one is seized by intense lust and comes to attack the opposite sex as their desire commands... As the members of the Film Research Club gradually turn strange in speech and behavior, can they make it out of the school safely? And just what is the fate that lies in wait for them...?!