Defining a King

What is a King?, is the fifty-seventh chapter of the manga series, Seraph of the End: Vampire Reign.

Short Summary
The fight between Kureto and his father, Tenri, continues. With the help of Mirai and Abaddon, Kureto is able to defeat his father. Shortly a mysterious being appears before Kureto and introduces himself as Shikama Dōji, the First Progenitor. Meanwhile in Osaka, Guren explains the violent struggle between the potential heirs to become head of the Hīragi family and hints to the demon, Shikama.