This looks fantastic! I can tell you put a lot of work into this. There is so much detail, in the background and the finer points of the outfit. Unfortunately, I don't know what Love Live is, but I still know good art when I see it. Personally, I have a lot of trouble working with markers, because they rarely provide a consistent amount of color and usually looks a little patchy; however, you've taken that and turned it into a good thing. That's fantastic work. I also want to point out the fire near the bottom of the piece, just because it looks a lot like calligraphy. You've got a lot of skill.