MDTM-696 Story of Making Babies on Fertile Days with a Sensitive Premature Ejaculator Sister Yui Nagase ACT.012

My little sister Yui. She's cute and has a serious personality. But she's actually really into dirty stuff? Because we have sex every day, her test scores are barely passing. If this keeps up, she'll fail the year. Let's stop having sex for two weeks and study hard together! Somehow, we managed to pass the tests, and today is finally a rare brother-sister time alone. As soon as we check into the love hotel, we start kissing right away! Both of us are in max arousal mode and immediately start going at it!!! Despite it being her ovulation day, we do it multiple times with me finishing inside! I won't stop until I've done it ten times or she'll kill me! How much longer can I keep resisting these temptations?