​Experience the groundbreaking hentai series that has forever changed the landscape of adult animation. Explore the dark and twisted world of violence, perversion, and insatiable lust in this immensely popular h-series. This collection comprises three distinct titles – Isaku, Shisaku, and Kisaku, each revolving around the sadistic brothers they are named after. In this episode, Kotomi’s summer vacation takes a thrilling turn when she discovers a note in her room, containing explicit information about herself. Compelled to follow its instructions, she finds herself trapped in the old school building with her classmates. As girls start mysteriously disappearing, a nightmarish tale unfolds, featuring hardcore sex and unconventional fetishes. Brace yourself for an unforgettable journey into the depths of desire.​