Yui Hatano, a widow raising her son alone, finds her life shattered when her son brings home a male friend who demands her body. Desperately resisting, she is horrified to discover her own body responding against her will. Witnessing the scene, her son begins to perceive his mother as a woman for the first time, awakening forbidden desires within him. As grief and loneliness blur into carnal longing, a taboo mother-son relationship begins to unfold.