Rinka, a married woman who is frustrated by sex with her indifferent husband, invites a man she met on a dating site to her house while her husband is away and has an affair to soothe her throbbing crotch. Numbed by the pleasure of her throat that she cannot experience with her husband, Rinka repeats her affairs while her husband is away on a business trip. One day, she is supposed to invite a man over to have sex as usual, but the man gives Rinka a drug and plays with her throat with his friends. Rinka gradually goes crazy, screaming in ecstasy.