They say love sets you free. But Mattheo Riddle’s love is a gilded cage with iron bars. ​He is the son of the Dark Lord, yet the only force he truly obeys is Y/N's voice. Trapped in a vicious, volatile cycle of breaking up and making up, they destroy each other when they are close, and lose their minds when they are apart. Mattheo is brilliant, charming, and cruel to everyone around him, but entirely fragile and helpless in her arms. ​How far does the limit of an obsession go when your very sanity depends on someone else?