Neither the gif nor the music is mine. The gif is totally unrelated and comes from Imgur: https://i.imgur.com/2mZK9GO.gif
Samurai Empire (2012-2014) is an ancient mobile game. All the BGM was composed by Motoi Sakuraba. It’s a city sim x card battle game with similar mechanics to Valkyrie Crusade. This is the theme that plays in your town. I was a child when this game existed and I’m glad to be able to rediscover the music again today, and now, everybody gets to listen to it anytime they want!