Starting today, classmate Kana Yura makes her appearance. She suddenly begins a sex education lesson, leaving her classmates shocked with questions like, "Huh? Intercourse?" But the school doctor arrives as well, stepping in to properly teach them the knowledge needed to become good wives. They learn about risks of STDs, techniques of foreplay, and what happens during nighttime activities, while attractive male students embrace and kiss passionately. Tongues intertwine and eyes grow hazy with lust, while lower-status boys in the corner frantically take notes, the tension in the air building steadily. The lesson begins with delicate cunnilingus instruction—just barely grazing the clitoris—demonstrating precise oral techniques. Hands grip a cock from both sides, with one boy shyly reporting, "This side feels harder... embarrassing." Before penetration, STD testing and vaginal pressure checks are performed, emphasizing how a woman's tightness is an important factor. Is high vaginal pressure a sign of virginity? With that, a student's large cock plunges deeply into her in missionary position. Careful instructions are given—don't put too much weight, be gentle, adjust leg position and width, and demonstrate proper thrusting technique. But the doctor intervenes, reminding everyone that women must be treated gently and with care. The G-spot is stimulated to maximize pleasure, making her twitch and arch like a shrimp, crying out, "I don't want to feel good like this—nooo!" Lower-status boys eventually join in, escalating into a threesome. A smelly cock ruthlessly penetrates the queen bee schoolgirl's tight pussy, culminating in an undeniable creampie. As piston-like thrusts continue under the guise of "vaginal cleansing," they're taught to remember that sperm differs in taste and smell from person to person.