Fifteen years ago, he met and befriended a man named Kumoshichi who goaded him into fights and gambling. Kumoshichi was in a relationship with Oshino who cared deeply of him and hoped to marry. At one point Yukiatsu and Kumoshichi had an argument and Yukiatsu was forced to kill him in self-defense. The event was so traumatic that Yukiatsu blocked out the memories, and unconsciously summoned a Yoi in Kumoshichi's form. At some point he was brought to the vagrant camps, escaped, was recaptured, and escaped again; his arm and shoulder are still tattooed from this.