Cuphead is a character with a cup-shaped head and a straw sticking out of it. He's the next opponent Boyfriend will face, and he's got some solid singing skills. In this mod, Boyfriend not only challenges Cuphead but also takes on the skeleton Sans and the Inky Demon.

Each antagonist comes with their own unique track: "The Last Reel," "Sensational," and "Snake Eyes." To win, Boyfriend needs to reach the final song with as few mistakes as possible. You'll need to press the arrow keys when matching symbols align. If you hit the notes accurately, victory will be yours, but too many errors will give your opponent the upper hand.