Momi is Carol's mother who is now making her debut in the world of FNF Games, being just as talented as her daughter, and you and Boyfriend will measure up against her right now in this awesome mod that has three original songs for you:
Boyfriend Vs Momi, a musical battle of two generations!
From the main menu you can choose to battle this character in either the story mode or free play mode, but to win you have to do the same thing in both, which is play all your notes according to the charts until you reach the end of the songs.
So, when arrow symbols float and match above BF, press the identical arrow keys at the same time. Be careful not to miss doing that multiple times in a row, or you lose and have to start again from scratch. Good luck, all the best we wish you all!