夫婦仲は良いのにセックスだけが足らない。毎日のように一人で自分を慰める虚しい夜を送っていた愛里。そんなある日、ママ友とのランチで耳にしたセックス代行サービスの噂。既婚者の間で流行っているというそれに最初は嫌悪感を抱いたものの、押し寄せる淋しさに耐えられず自宅へ見知らぬ男を招き入れてしまう。

Airi and her husband have a good relationship, but they're lacking in sex. Every night she spends empty nights comforting herself alone. Then one day, during lunch with her mom friends, she hears rumors about a sex surrogate service. Initially disgusted by the idea that it's popular among married people, she can no longer bear the overwhelming loneliness and ends up inviting a stranger into her home.