The Pibby virus has been spreading throughout the FNF universe and has now made its way into the Amazing World of Gumball. The only character left uninfected is Darwin, who will assist Boyfriend in curing the afflicted antagonists through a series of music battles featuring tracks like "Child's Play," "My Amazing World," "Retcon," "Forgotten World," "Mindless," "Blessed by Swords," "Brotherly Love," "Suffering Siblings," "Come Along With Me," and "No Hero Remix."

Finn, Jake, and Gumball are eagerly awaiting Boyfriend’s help, as only he can restore them to their former selves. To succeed, Boyfriend must perform each song flawlessly, reaching the end without making too many errors. As Boyfriend sings, you need to press the correct keys corresponding to the characters on the screen when their symbols align with the templates. Stay focused to avoid critical mistakes and prevent the song from ending prematurely.