Mope Mope is a flower that hides quite the nefarious personality, since it has an alter-ego that is a straight-up murderer, yes, so you now need to defeat it in a rhythm battle to vanish away the evil from it!
FNF: Boyfriend Vs Mope Mope, let's defeat the evil flower!
When you see the floating arrow symbols of the chart match above BF's head, that is when you press the identical arrow keys to hit your notes. If you can keep doing it until the song ends, you win, but if you miss hitting notes multiple times in a row you end up losing and having to start from the beginning of the song. Good luck, enjoy!