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 specific game the original theme is played comes from “東方花映塚 ～ Phantasmagoria of Flower View“ Someone actually found the picture thanks Hyper Nuclear Engine X20A duder Download link (fixed [its not a virus i swear]):