Rinkan Biyaku Chuudoku - Season 1

The story centers on a young woman named Sayaka, an ordinary girl who appears innocent to most. However, one man becomes fixated on her, fantasizing about her tearful pleas. Unaware of the depth of his sadistic urges, he starts to stalk her, seeking a reason to view her as corrupt. His obsession escalates when he receives an anonymous DVD in the mail. The footage depicts a private gathering at a wealthy residence where adults engage in rough sexual acts with a young girl-Sayaka. Days later, the sender contacts the man, revealing knowledge of his identity and perverse interests. He is recruited to provide "training" and is supplied with a specialized drug, the same substance used during the filmed event. Sayaka has developed a powerful addiction to this drug, her existence consumed by the need for it. Her desperate cravings drive her to beg and plead, perfectly aligning with the man's sadistic desires now focused entirely on her.