HRSM-071 Sister Observation at Home (Toilet, Masturbation, Changing Clothes, etc.) Awakened during Swimming Competition → Chaos → Forced to Harden Up and Suffer Mental Collapse: 4 Student Sisters

Right after becoming conscious of the world, the woman who feels closest is often a sister, younger sibling, or even a mother. This time's target is 'younger sister'. All four have extremely high looks and body levels, as a younger sister she scores 120 out of 100. I planned to use drugs to make her do whatever I want in her dreams, but she woke up halfway through. Since that day, it's been a living hell. There's no choice but to go all out and ×××.