Momose has always hated the attention drawn by her enormous breasts and gradually withdrew from other people. Then a gang of local thugs spots her during her commute. They grope breasts too massive to contain in both hands and torment her without hesitation, even in public. When they follow her to work and treat her like a disposable masturbation toy, the humiliation unexpectedly awakens pleasure unlike anything she has felt before, leaving her increasingly conquered by the abuse.