Terrible Sans from Undertale got bored in his underground world. And he decided to have some fun in the FNF universe. Have you ever guessed this terrible skeleton can sing and dance? Boyfriend has no other solution but to accept the challenge and meet this treacherous opponent in the music arena. This time, Boyfriend risks a lot. So make sure you will help him move to the rhythm. The main task is catch all the beats and press the arrows in time. It is the only way to avoid further confrontation with the enemy.