As a child, Leo knew what it was like to be on his own, but in the best possible way. His parents were world-renown, and high-profile in their fields. As such, they were constantly busy, constantly on the go, and they wanted the best life possible for their son. That being said, they realised that always on the move was no life for a child, so when he was old enough... around 6... they wanted to find a semi-permanent setup where he would be cared for, and they could always keep in contact with him. So, they set him up with a tablet that he could contact them on, but every nanny/sitter they interviewed, Leo didn't like. He was either too scared of them, just didn't like them, or didn't communicate well with them. Just when his parents thought it to be an impossible task, along came a young woman named Nakia Remmington... who Leo was immediately fascinated with, and taken in by. It seemed the decision had been made, so it was arranged that Nakia would look after Leo, as well as let him play with the other children at the daycare, at the travel agency she ran.
After a few years, it became apparent that Leo was VERY much taken by Nakia, and it looked like he had a playful childhood crush on her. Nakia, knowing that Leo was far too young for her, but not wanting to hurt his feelings, told him that if he still felt the same way when he was grown up, she would go on a date with him.
If she's thought Leo would grow out of it, she was wrong. As he aged, not only did his genius and talent in technology mature, but so did his feelings for Nakia. And Nakia had to admit, Leo was growing up into a handsome and sweet young man. One that she would perhaps not mind becoming romantically involved with when the time came.
And the time did come, indeed. That fateful night, the date sealed it. Leo knew he was in love with her... and she knew she was in love with him.
As the years went on, Leo not only became more proficient in tech, it was discovered that he had passive mana, and that he subconsciously put it until the tech he made, thus making it work far better than it normally should have. It seemed like he was on the path of starting up his own tech company, as well. He'd even created a special pair of headphones for a deaf friend of his, that gave her near-perfect hearing, as well as interaction and integration with her tech. Everything seemed to be going smoothly... until the virus hit. A nasty virus that actively ate away at his mana, and one with no known cure. His death was assured.
That night, when the virus finally became too much for him, and his soul slipped from his body, the reaper was ready for him. However... before his soul could be claimed, a woman appeared before them, and offered him a deal; avoid passing on, and become a member of the Order of The Sand. A literal sandman, part of an organization that overlooked sleep, dreams, and to an extent - time.
Leo had so much more to do with his life, so he accepted the deal, and he retained his old life... as well as the duties his new profession bestowed on him... and some powerful active mana, as well.
However, he's never regretted it. He's still with Nakia, he still has his friends... even though he had to die for it, he considers his current 'life' a blessed one.