Kyō no Kira-kun is a Japanese shōjo manga series written and illustrated by Rin Mikimoto. It is published by Kodansha on Bessatsu Friend. The first volume was published on 13 January 2012. A live-action adaptation was released on February 25, 2017.

Bessatsu Friend , formerly known as Bessatsu Shōjo Friend , is a Japanese shōjo manga magazine published by Kodansha. It was originally conceived as a bessatsu, or companion magazine, to Shōjo Friend, which is no longer published. Bessatsu Friend is commonly known by the abbreviated name Betsufure (別フレ) and is published on the 13th of each month.