Devils' Line: Volume 1 by Ryo Hanada introduces a dark urban world where vampires coexist secretly with humans. Tsukasa, a university student, becomes entangled in a dangerous secret when she encounters Anzai, a half-vampire working for a covert police force that monitors vampire-related crimes.  

As Tsukasa learns more about the hidden world of vampires, her life becomes intertwined with Anzai’s, leading to a complex relationship filled with tension, mystery, and forbidden emotions. Anzai struggles to control his vampiric urges while protecting Tsukasa from lurking dangers.  

Blending suspense, romance, and supernatural elements, Devils' Line explores themes of humanity, morality, and love in a society filled with prejudice and fear. With its intense storytelling and intricate artwork, this gripping manga delves into the gray areas of right and wrong, drawing readers into its captivating and dangerous world. Will Tsukasa and Anzai survive the challenges ahead?