Lurking within the shadows of our world are sinister creatures known as D's - dangerous monsters with the ability to flawlessly mimic their victim's form before seizing their identity and wreaking havoc. Kei, your average high schooler, becomes privy to their existence when his childhood friend, Hinata, falls prey to one. Determined to safeguard her from harm, Kei unwittingly finds himself embroiled in Othello's affairs - an organization committed to eradicating these deadly beings once and for all.
