The son, overly sheltered and doted on by his mother, gradually grew distant from the outside world and became a recluse. Upon reaching puberty, he began to see his mother as a sexual object. The house was equipped with numerous hidden cameras, and the footage became the catalyst for a shift in their relationship. When his homeroom teacher visits their home and has sex with his mother, the son discovers the recording and begins using it as his personal plaything, eventually treating his mother as his own sexual toy.