Saki Toyama, an editor at Harukawa Literary Arts, finally transfers to the literary magazine she has always wanted to join and throws herself into securing the publishing rights to rising female author Yoko Azuma's new novel. With Yoko suffering from writer's block, her assistant Samejima suggests that she try tying up a real woman. Saki agrees to cooperate in exchange for the rights to the book, but her desperation to make Yoko write leads her to become a bondage-training model and sink ever deeper into the world of BDSM.