S01E07 — Kuro's Past

Kuro encounters Yakumo, the ex-ward of Reishin before he massacred most of his tribal clan, in the streets of Tokyo with his new contractee named Riona. Kuro tells Keita how she came to Earth, revealing her origins as the princess of his tribe and the tragic history of her tribesmen after Reishin was told by her mother that he could alter the destiny of the world to either lead it to prosperity or lead it to its doom. Hiyou appears at the airport and fights Kuro before he decides to retreat. Excel and Steiner see Keita and the others at the airport before she gives him the Hex Ring as a gift to help him fight alongside Kuro.