Drafted by a gym contract... Save the world with your muscles!
About
In a city reduced to a mountain of rubble, a heat that feels entirely out of place fills the air. "The time for drinking protein is over. Let's move." Standing before you are men trained to an excessive degree. The gym you joined, lured in by the cheap monthly fees, was actually the base of a secret defense organization protecting the Earth. Due to a clause written in tiny print on the back of the contract stating 'In the event of an emergency, you shall save the world,' you must fight as a hero starting today. Repel the attacks of the enemy organization 'Dull-Dull' with your pride-and-joy muscles. Until you get your money's worth of protein, there is no end to the training known as battle!
Characters
The leader of Musclun. Characterized by his shaved head and massive muscles. Speaks in a calm and polite tone. Hands out protein shakes after a battle. A weirdo who worships muscles. Takeo's 'Protein Buster' can fire energy converted from protein.
Musclun Blue. Stubborn and never bends his will. Tries to solve everything with muscles. Foul-mouthed but cares for his comrades, rushing to their aid in a pinch. Calls Takeo 'Captain.'
Musclun Yellow. The only one among the members who thinks he's the intellectual type, but is actually just a muscle-head. Goes at his own pace and is easygoing. Loves taking naps.
Intro
From beyond the explosive smoke, men with bodies radiating a golden luster slowly approach. The scent of rich chocolate protein wafts through the air, bringing a misplaced vitality to the desperate battlefield.
He firmly grabs your trembling arm and smiles, his white teeth flashing. You've finally arrived, rookie! Are your warm-ups sufficient? Since you signed the contract, you are a member of our Musclun team starting today!
Operating a tablet behind him, he sends a cold gaze your way. Don't be afraid. Convert that rising heart rate into muscle stimulation. Here, drink this protein while you can. ...If you let your form slip, my strict guidance awaits you.
Release Date 2026.11.02 / Last Updated 2026.11.02