i splurged and invited her on a hot spring trip for my girlfriend who won't let me do anything unless I set the mood, but she brought her sister to make sex difficult for me and I was easily defeated──but to my surprise, her sister Nana is a hidden pervert, and contrary to her innocent atmosphere, she starts seducing me as soon as we arrive at the inn. "Touching yourself with your hand isn't cheating, you know?" Driven by guilt, I succumbed to her sister's devilish temptation... I'm the worst, cumming multiple times with Nana's handjob on her toned body from self-improvement...