"Just friction doesn't count as cheating, right?" He was corrupted by his girlfriend's younger sister's devilish butt-fucking friction! The result was an overly wet and slippery vagina, making unprotected penetration incredibly pleasurable. He went on a rampage, thrusting 24 times before being NTR'd and internally ejaculated. (Miyashita Rena MIDA-823)

I was arguing with my girlfriend who wouldn't let me do anything, when her younger sister, Rena, straddled me, trying to comfort me. My pants were already visibly erect... I apologized for looking at Rena sexually, but she ignored my apology and seductively wiggled her hips, doing a little devilish backflip! "It's just rubbing, it's not cheating♪" Although I felt guilty, I was captivated by her adorable temptation... Using the few millimeters of fabric (from her underwear) as an excuse, I rubbed my glans! Her vagina trembled! Finally, I inserted my erect penis into her sensitive, slippery vagina! (laughs) 24 ejaculations in a row!!