Night of Nights (Flowering nights remix) By COOL&CREATE/beatMARIO

The original song is Flowering Nights, Izayoi Sakuya's theme. Touhou is a Japanese doujin game series focused on “Danmaku“ or bullet hell shooters. The original theme is played in the 9th Touhou game, “東方花映塚 ～ Phantasmagoria of Flower View“ Someone actually found the picture thanks Hyper Nuclear Engine X20A duder UPDATE: Youtube made me remove the direct image link. It will be on Danbooru at “posts/58034“ (artist)