Yui Amane's third exclusive release! Her first drama work shows Ke'ai at its fullest! During the few days I stayed at her house where she lives with her sister, I couldn't resist her innocent and cute seduction, so I had sex with her secretly so that she wouldn't find out. I fucked my immature and sensitive sister from morning till night, and her adorable reaction was so endearing! I can't let her find out! Both I and my sister escalated in this thrilling situation...