New social studies teacher Mei Kamisaka draws attention with her overwhelming cuteness and serious demeanor. During a physical examination in front of students, she struggles with the dilemma of being unable to properly measure erections because she instinctively averts her eyes from the naked boys. Then, a handsome doctor from a university hospital strips her naked, presses on her nipples, and performs a rectal exam from behind while students stare openly, plunging her into a whirlwind of humiliation and pleasure. "The doctor's fingers feel too good," she moans, trembling and dripping with arousal. As practical training for gender selection unfolds before the students, emotions rise when the doctor kisses her deeply, their tongues entwining. The prim teacher's reserved nature gradually gives way to unexpected sensuality. Her body betrays her as students lean in close, whispering "So big..." while jerking her erect clit, drooling over it and sucking it with intense vacuum blowjobs. The classroom overflows with raw erotic tension as a huge cock thrusts from behind. Students watch as the doctor demonstrates gender selection techniques—deep, forceful thrusts for "boys," shallow strokes near the entrance for "girls." "Wait, don't look!" "I can't hold back, teacher!" "Just do whatever you want!" she pleads, riding the doctor wildly, then bent over and pounded hard from behind, trembling on all fours. Her big tits sway with each thrust, arousal spiking under the students' gaze, her lewd nature fully exposed. Though she appears strict and serious, she's actually a horny, lonely teacher craving cock every single day. Will the child be a boy or a girl?