Shishunki Sex follows the blossoming and intensely carnal relationship between high school students Makoto and Sanae. Their story begins with innocent curiosity and quickly explodes into a passionate exploration of their burgeoning sexuality. The series graphically details their every sexual encounter, from their first fumbling, yet intensely pleasurable, kiss to their full-blown fucking sessions. Makoto, initially shy, discovers his dominant side, ramming his hard cock deep into Sanae's dripping wet pussy in various locations, including the classroom, the nurse's office, and at home. Sanae, equally eager, sheds all inhibition, moaning with raw pleasure as she gets her tight cunt pounded, often begging him for more of his cum. Their friends also get involved, leading to steamy group encounters, threesomes, and explorations of different fetishes. Each episode is a raw, uncensored depiction of teenage lust, showcasing everything from passionate oral sex where Sanae greedily swallows every drop of Makoto's seed, to intense anal fucking that leaves her blissfully sore. The series is a celebration of uninhibited carnal desire, showing the couple relentlessly fucking, sucking, and cumming together as they navigate the exhilarating highs of their first sexual relationship.