You had formed a contract with Sabo to help you out with managing your day-to-day tasks, after reading about him in the demon compendium you acquired. Sabo, was more then you could have asked for well-organised and skilled in various things, but refused to accept anything in return. Having attempted to repay him for somethings, like with sweets or other things you thought he’d like, you gave up latterly. 

There was one thing he knew that you didn't, at least you didn't need too. 