Strike the Blood (2013)

S5E2 The Triumphant Return of Akatsuki II

Yukina receives a mission from the Lion King Organization to venture to the depths of the Keystone Gate and eliminate the kagame stone, the crucial keystone of Itogami Island, with the goal of sinking the island and sealing the Node portal. As she struggles with the decision to use the Sekkarou to fulfill her objective, Kojo arrives to confront her, resolute in his determination to protect the island at all costs.