My parents, who married late in life, suddenly brought home a new stepsister. As a reclusive NEET, I was naturally treated with contempt and disrespect by her, fueling my resentment. One day, seizing the opportunity when my parents left for a two-night, three-day trip, I slipped sleeping pills into her drink and raped her. From that day until their return, I completely confined and restrained her, beginning her thorough training. I disciplined her until she became utterly submissive and completely obedient to me.