Shy, plain, yet cute student "Rina" is popular among boys but disliked by girls. One day, after forgetting her homework, she's ordered by her teacher to reflect—completely naked. Threatened with lowered grades and pressured by the boys shouting, "What if we can't get into good schools because of you?!", Rina is forced into submission. She's cornered—either she undresses, or someone else must take the blame.
She's made to distribute class handouts while exposing her breasts, forced to drop erasers so boys can peek under her skirt. Harassed and taunted, she's stripped down to her panties, then made to stay fully naked during cleaning duty.
Crying out, "Stop it already!" and "Isn't this bullying?!", she's touched on the back, her breasts groped from behind. When the teacher leaves, her body measurements are forcibly taken. Accused—"Whose fault is it that our test time got shortened?"—she's pressured to take responsibility.
"Start jerking off!" she's ordered, forced into a wide M-shaped split to masturbate while secretly filmed. The videos might end up online. Sobbing, "Stop, stop!" and "Don't record me!", her body betrays her with involuntary twitches at even the lightest touch.
"I'm not turned on!" and "My clit isn't big!" she protests, but a large cock thrusts inside her—her first time. When stamina fades, they switch positions. A gangbang ensues with male students taking turns, while girls watch in humiliating silence.
"Ah! Nngh! I'm not enjoying this at all!" she screams, but creampie after creampie of fresh, young sperm floods her womb—pregnancy be damned. Finally, she's made to smile for a commemorative photo. Peace sign! Don't forget your homework again!