Goei no Method: Saidai Hyouteki no Shoujo to Chouten no Ansatsusha
護衛のメソッド ―最大標的の少女と頂点の暗殺者―
Michizane, known as the top assassin in the criminal underworld, wants to leave his violent life behind by enrolling in high school. To gain admission, he must agree to the school president's condition: protecting the president's daughter. She is a target of international criminal groups.