In 'Musclebound Mayhem,' you play as YEXPZN, a quirky and jovial father who unwittingly becomes the subject of a bizarre experiment crafted by your 18-year-old son. Unknown to you, he’s been secretly spiking your meals with a muscle growth serum that turns you into an unstoppable force—both physically and in confidence. As you navigate through exaggerated challenges, from bizarre fitness competitions to surreal outings in your increasingly massive new body, all while maintaining your relationship with your son, you must figure out if this new life is a blessing or a chaotic prank gone too far. Will you embrace the gains and chaos or uncover the truth behind this unintended transformation?