On her first overnight study trip as a teacher, YORU TSUKUMO returns from the bath to find nerdy physics teacher Kamimura in her room. He has long viewed her sexually and corners her despite her resistance, forcing non-consensual sex on her. Though she hates what is happening, his huge cock and precise thrusting gradually make her climax repeatedly. Back in everyday life, he keeps demanding sex. She finds him repulsive, yet her body cannot forget the stimulation, and she sinks deeper into pleasure under his relentless technique.