Long story short, he is a prince. Was kidnapped as a baby, forced to live a life in poverty full of every kind of abuse you can imagine. Became an inventor/programmer using scraps, nothing short of a mathematical genius. Only found his parents by pure luck because he decided to steal food from them out of desperation. Now he lives like royalty but he can’t just make the past go away.
This drawing is of Mattaeo looking very annoyed at an pompous antagonist character called “Wesley” who persuaded him to go out into the gardens to prank him at what’s nicknamed as the boys club. (think boarding school/summer camp for the male children of lords, ladies, dukes, dutcheses, kings and queens. Lots of spoilt young adults. Mattaeo really does not fit in well)