A man kidnaps a bespectacled girl named Yui and imprisons her in his home. He drugs her to keep her unconscious, indulging his desires on her defenseless body—sniffing her scent, groping her crotch—his sexual urges never ceasing. When Yui wakes up, she's shocked and panics at the sight of the strange man. She tries to escape, but he chokes her into submission. Crying in fear, she's ultimately raped by him. Afterwards, Yui is trained as the man's pet. He records the entire process and streams it online. Through daily brutal training, Yui gradually awakens to sexual pleasure, overcoming her terror. Eventually, she begins craving his cock herself. Spanking, deep throat, squirting, forced orgasms, brainwashing—after relentless training, Yui transforms into a being obsessed solely with pleasure. Her mind slowly succumbs to the man's control, evolving into an entirely new existence.