Minami Aizawa plays a composed and meticulous schoolteacher going about her daily lessons. Among her students is a boy who has developed romantic feelings for her. But his emotions are not simple affection—they gradually twist into something abnormal. His obsession intensifies, driving him to extreme acts like hidden camera filming and stalking. As the line between reality and delusion blurs, his mind spirals beyond return. Amidst the intersection of love and obsession, how will her life be changed?