The moment I was asked by my private tutor older sister to undergo "ejaculation control," I unexpectedly encountered her extremely sadistic side! "You must obey everything I say... No coming whenever you feel like it," she commands strictly, rigorously training me with squishy handjob sessions, slurping blowjobs, and tight, pulsing vaginal squeezes—all while forbidding me from releasing even once. Enduring her merciless torment of forced restraint, I eventually explode in a massive, uncontrollable climax, experiencing pleasure so intense it feels like my entire brain is orgasming—an ultimate, extreme pleasure experience!