MDTM-696 [Uncensored Leaked] The story of a sensitive younger sister who gets off easily and has premature ejaculation, and how they try to conceive a baby on her ovulation day - Yui Nagase ACT.012

My little sister, Yui. She's cute and has a serious personality. But actually, she's very interested in naughty things!? Because we have sex every day, she's barely passing her tests. If this continues, she'll fail. We forbid ourselves from having sex for two weeks and study hard together! We somehow managed to pass the tests, and today we're finally alone together as siblings. As soon as we get to the love hotel, we start French kissing! We're both at the peak of our sexual desire and immediately start wanting each other! Despite it being her ovulation day, I cum inside her multiple times! She keeps tempting me, saying she'll k** me if I don't cum 10 times! What will become of me if this continues!?