SIS-009 Sister Complex Yui Oba - Oba Yui

Sister label's first drama work! "I want to have sex with my sister." An older sister who is confused while somehow escaping from her younger brother's sexual desires that are approaching on a daily basis. But one day, he finally crosses the line. "What should I do..." My sister worries... But! ? Unstoppable Younger Brother's Sexual Impulse! Conflicted older sister! And what is the final decision that my sister made? A forbidden immoral story! !