A female teacher named Amane finds herself falling into the abyss of lust after receiving a threatening letter about being caught filming sexual acts with her student Shinnosuke at school. The boy responsible for the footage, Toukou, forces her to promise him one night of sex under threat of exposure. As a breast maniac, he tricks her into drinking a drug that makes her nipples extremely sensitive, allowing him to tease and pleasure them endlessly using his fingers, tongue, and toys. Her overstimulated nipples become incredibly responsive, leading to multiple orgasms. Despite their initial agreement on just one night together, Toukou continues to take advantage of Amane's desperation, pushing her further down the path of depravity until she begs for more intense stimulation, eventually becoming an insatiable slutty teacher unable to control her perverse desires...
