Song: https://www.youtube.com/watch?v=fBb51HroqD0
Background: https://www.pixiv.net/en/artworks/67467093
Timing and MP3 from jonathanlfj: https://osu.ppy.sh/b/1898745
Your background is too big, as it is a png.
Here is a jpeg to use instead: https://cdn.discordapp.com/attachments/298289508703797248/708999519487918110/tenshi.jpg