Using the Koma Sword, Shiro successfully seals Rin's demon heart. This separates Rin from his demonic nature and returns him to Yuri's arms. However, the respite is short-lived as Satan forcibly possesses the body of the Paladin Abel. Satan's love for Yuri has turned into obsession, but Yuri's words can no longer reach him. Satan explodes with emotions and attempts to take possession of Shiro's body. Shiro makes a bold move to prevent himself from being possessed, but...

Shiro offers to leave the twins with Mephisto under the assumption that he has a plan to raise Satan's children.