"I guess the reason I'm your mother is so we could do this..." says Yoko, a single mother who has struggled to raise her two sons. Now grown, the boys have become strong and assertive. The younger son obsessively pursues his mother, driven by his own sexual desires. Though she resists, her mature body betrays her will, responding to her son's advances. Witnessing this act between his mother and younger brother, the eldest son resolves to express his own hidden feelings physically. A complex tale of desire and forbidden relationships unfolds between a mother and her sons.