ビン底メガネ、黒髪おさげ髪ー。地味でド陰キャなりおなは、冷めきってしまった夫とのつまらない結婚生活に飽き飽きしていた。そんなある日SNSで見つけた、「港区パーティー」の広告。派手で煌びやかな生活で自分を変えたいと望んだりおなは、単身そのパーティーに乗り込んでしまう。そこで吸わされた媚薬シーシャでアヘ顔で潮吹きを撒き散らし、キメセク中毒に豹変したりおなは、ド派手な服と金髪を身に纏い、さらに港区のぬまにどっぷりとハマっていって…。

With her thick-rimmed glasses and black pigtails, Riona, a plain and introverted girl, was utterly bored with her dull marriage to a husband who had grown cold and distant. Then one day, she stumbled upon an advertisement for a "Minato Ward Party" on social media. Hoping to change herself with a flashy and glamorous lifestyle, Riona went to the party alone. There, she was given a shisha licorice drug that made her squirt uncontrollably, her face contorted in ecstasy. Transformed into a sex addict, Riona donned flashy clothes and dyed her hair blonde, sinking deeper and deeper into the world of Minato Ward…