Every day, Ai, a beautiful, clean-cut girl with short hair, dedicates herself wholeheartedly to her school club activities. One day, lured by a mysterious direct message on social media and eager to earn some extra cash, she naively heads to meet a suspicious man without suspicion. The moment she willingly takes the drug he offers, her mind gradually falls under control. Clinging to the faint hope that she's still young and can quit anytime, she steps onto a path from which there's no return.