Erika Shinohara has taken to lying about her romantic exploits to earn the respect of her new friends. So when they ask for a picture of her "boyfriend," she hastily snaps a photo of a handsome stranger, whom her friends recognize as the popular and kind-hearted Kyouya Sata. Trapped in her own web of lies and desperately trying to avoid humiliation, Erika explains her predicament to Kyouya, hoping he will pretend to be her boyfriend. But Kyouya is not the angel he appears to be: he is actually a mean-spirited sadist who forces Erika to become his "dog" in exchange for keeping her secret. Begrudgingly accepting his deal, Erika soon begins to see glimpses of the real Kyouya beneath the multiple layers of his outer persona. As she finds herself falling for him, she can't help but question if he will ever feel the same way about her. Will Kyouya finally make an honest woman out of Erika, or is she destined to be a "wolf girl" forever? The story centers around Erika Shinohara, a vain 16-year-old girl who tells her friends about her romantic exploits, but she actually has no boyfriend. She claims that a handsome boy in a candid photo is her boyfriend, but it turns out that boy is a schoolmate named Kyouya Sata. She has no choice but to make him her fake boyfriend. Unfortunately, Sata may look like a sweet person, but he is actually an ultra-black-hearted sadist. Sata takes advantage of Erika's weakness and treats her like his dog.