Sister Ami and younger sister Ai live with their often-ill mother. A year ago, their mother remarried, and the stepfather, a wealthy and kind man, provided them with a comfortable life without any hardships. However, one day while their mother was hospitalized, the stepfather showed his true colors... He threatened to rape Ai if Ami refused sexual acts, subjecting her to forced internal ejaculation and humiliation. He incited Ai by saying 'You're unnecessary because your sister is here,' forcing her into oral services. The helpless sisters desperately sucked his penis, using their young bodies for sexual service, having both their minds and bodies violated.
