An original song by 96neko, the opening for the anime Kuzu no honkai (Scum's Wish). Really dynamic, slightly melancholic, right up my alley. 😄 (Also obligatory Watch Scum's Wish, you cowards!)

I think I also once saw a video of 96neko doing a live performance of the song together with other cast from the anime somewhere during some event, but can't find it anymore.