- Name: K ~Days of Blue~
- Author: Kuroe Yui (Art) & GoHands & GoRa (Story)
- Genre: Action, Supernatural.
- Magazine: ARIA.
- Year: 2013
- Summary: Tokyo Regional Legal Affairs Bureau Census Division, Annex 4 also known as SCEPTER 4 is a police institution that aims to stop criminals with special skills. But for them, their real target are…?