Maki Amamiya is a refined and elegant woman with a gentle demeanor and graceful presence. Having lost her husband at a young age, she has raised her son alone, pouring all her love into him. Her deep maternal affection gradually transforms into romantic feelings toward his homeroom teacher and private tutor. These emotions soon evolve into a forbidden relationship with her own son, blurring the lines between a mother's love and illicit desire in a shocking, intense tale of incest.