Brightside FNF uncovers the story of a same-named boy and a parasite that occupies his brain. The five songs here are quite unusual, telling the story better than cutscenes.
Going mad with the monster’s toxins, the stranger boy kills somebody late at night. Our musical couple is the only witness, and walking by is not in its fashion. Expectedly, the Parasite conquered their minds, too, locking them three in one imaginary dimension.
Now, your primary goal is getting out with the poor victim. The mode has two endings and two secret songs just for players who love delving into app files.