Undercover agent Yuri infiltrates the hideout of the brutal organization "NA MA." Captured by a group of men whose semen always causes pregnancy, she struggles to maintain her pride as a woman and her duty as an agent amid the terror of inevitable impregnation. However, her resistance is crushed by relentless forced orgasms and repeated creampie rapes, gradually consuming her into their world. Will her choices shift from upholding justice to a desperate fight for her own survival?