This was really good. I liked everything about this. The art style is kinda simple but very appealing looking. The animation was really nice. The story was interesting. I think this has plenty of potential for a sequel or even a series, because you have very effectively set up a foundation for that. You set up the whole thing with him becoming a fighter pretty well and set up his team too, there is a lot of potential for things that could happen in the future. There could also be some more development, more could be shown in regards to the world that has been set up, the characters can further develop. I feel like you did really good at making this both enjoyable on its own and being able to set up a potential series. I'd look forward to seeing what could happen with this in the future.