Saki Toyama, an editor at Harukawa Bungei, has been transferred to a literary magazine that she had always wanted to work at, and is eager to acquire the publishing rights to a new work by up-and-coming female writer Yoko Azuma. Meanwhile, Yoko is in a slump, and her student Samejima suggests to her, "Why don't you actually try tying up a woman?" Saki makes a contract with Yoko in exchange for the publishing rights to her new work, agreeing to cooperate with her. In her desire to help Yoko write, she becomes a model for bondage training and becomes immersed in the world of SM.