The Devil’s Proof of Your Existence, also known as 君の存在という悪魔の証明, is a poignant web novel in the tragedy genre. Written in Japanese, the novel explores the concept of memory and existence, with the protagonist being the sole individual who recalls the existence of another in a world where that person has seemingly vanished. This thought-provoking oneshot delves into themes of loss and remembrance, offering a unique narrative that captivates readers with its emotional depth.