Yugo, a perfectly normal, non supernatural child, was left to the foster system at a very young age, young enough that he never got to know his biological parents. As a result, he grew used to moving from foster to foster, never staying with any one long enough to really view them as true parents. It's in this time period that he first met Shio (
reignitions), a fellow foster kid.
As he grew older, Yugo began to pick up an interest in motorsports, particularly motorcycle sports. The high energy sport drew his attention, and a particularly generous foster family helped enable him into the sport once he became old enough to ride his own motorcycle. It was something stable, something that he could hold onto in the inherent instability of the foster system.
However, Yugo was also a reckless teen, and was prone to trying tricks he saw online. At the age of seventeen, just short of his eighteenth birthday, he attempted a particularly risky stunt on his dirtbike in hopes of impressing his friends.
It went horrifically. Yugo was unable to replicate the stunt, and ended up in a nasty crash. Seriously injured, Yugo would have died even before making it to the hospital...
...if it weren't for the interference of the draconic entity
Zarc. Zarc, appearing to Yugo as he hovered on the edge of death, offered to save his life so long as Yugo agreed to 'entertain the masses' at least once a month. It seemed like an easy enough choice to Yugo, so he agreed.
Afterwards, Yugo awoke in the hospital to find out that he miraculously survived his accident, the interaction with Zarc only half remembered. He recovered remarkably fast, getting back to his life faster than anyone could have expected for such a serious accident. And in testament to his resilience, Yugo returned to motorcycle sports, switching from dirt bike racing to more traditional motorcycle races in order to satisfy his end of his deal with Zarc. He's proven skilled at motorcycle races for someone so young, setting up a solid win streak that has, so far, gone unbroken.
(Unbeknownst to Yugo, his 'deal' made it so that he's now
possessed by Zarc, blessed with boosts to his abilities and increased healing capability but at the cost of having to participate in some kind of public entertainment once a month
and win. So far, he has no clue what will happen if he loses a race.)
Beyond that, his life continues to look up. He recently got officially adopted by the Takahatas, thus making Shio his brother and giving him some additional stability now that he's finally out of the foster system. And most recently, a strange app called Libra has appeared on Yugo's phone, and refuses to leave...