My childhood friend Rui and I have been like siblings since we were little. We've been going back and forth between our houses since we were little, and even after I started living alone, she still came over to my house. Then, one day, I noticed... Rui's breasts, which are still growing, are getting really big! As if she knew about it, Rui started showing me both her breasts and her panties... Even though I tried not to notice, I couldn't help but stare. My crotch is already at its limit due to the sexy temptations of my cute childhood friend!