You have a wonderful opportunity to play Week 7 FNF, the mode that looks different from the modes you used to see before.
You are going to find one of the most popular custom songs. However, usually players have multiple choices of songs and new characters. Nevertheless, this modification is completely different. You are going to play one amazing song but you compete against three strong opponents.
The characters are surprising. Firstly, you can play against puffing fish, which looks really funny. Secondly, your opponent is a blue-haired girl, who wants nothing but to be together with her boyfriend. For the last, some partly demon Selever.
How to play? Beat all the characters and try to hit the right notes without any delays. You need to be careful as missing many notes leads to failure.