So I heard this sound tracksong many times but I have no clue what's thewhat its name is. It's It's in OVA 5 (when Sonic was training) and OVA 6 (S class hero murder)
I have a quick link, you can go toat 0:18 to listen). It's the trumpet soundtrack. (Sorry it vietsub)
I really want to find the music sheet for that, because I play trumpet. Thank you so muuuuch (´▽`)/