In order to help Nagi's rehabilitation, Shizuka searches for someone with a stronger killing intent and sets her sights on Takanashi Ryo, a highly skilled sniper. Takanashi is a madman who is only interested in "good targets." Shizuka asks Takanashi to snipe Nagi, plotting to awaken Nagi's true nature through his intense killing intent.

Taira Nagi, once the strongest assassin, was confined to a wheelchair after falling unconscious protecting his younger sister, Taira Shizuka. Shizuka works as an intermediary for assassins, taking on assassination requests and taking her brother to the battlefield under the guise of "rehabilitation." Hoping for her brother's full awakening, Shizuka accepts a request to eliminate Arashiyama Goro, the boss of a vicious gang of robbers.