Yui Amane's exclusive third release! Her first drama work, full of cuteness! During the few days I stayed at her house with her sister, I couldn't resist her sister's innocent and cute advances, secretly having sex with her without her knowing. The precious reactions of this immature and sensitive premature ejaculating sister drove me to have sex from morning till night! If we get caught, it's game over! This thrilling situation caused both me and her sister to escalate...
