Manami, a freelance designer, enjoys her single life, aided by her free-spirited personality. Her nephew Tomohisa, who has a friendship-like relationship with Manami, often visits her house and chats with her about anything and everything. One day, when Tomohisa returns home to retrieve his forgotten cell phone, he accidentally witnesses Manami providing sexual services to two male assistants. Every time he tries to forget, the image of Manami's lewdness comes back to his mind, and Tomohisa is unable to hide his shock, so he visits Manami's house again.