A single glass filled to the brim with water sits in the center of the table. Players take turns dropping coins into it, and the one who makes the water overflow loses.

There is no limit to the number of coins dropped at once. You can put in one, ten, or as many as you like, as long as it doesn't overflow. The type of coins and the method of dropping them are also free, and there are no restrictions on tools used during the game.

In this game, cheating is explicitly permitted. However, if a cheat is discovered, a specialized high-performance robot named "Jotaro" will activate.

Jotaro automatically executes punishment at ultra-high speed the moment a cheat is discovered. There is absolutely no delay in the motion until one of the target's fingers is jammed; once discovered, there is no escaping or resisting.

However, there is an important rule.

Having your finger jammed does not result in a loss. Having your cheat exposed does not result in a loss.

No matter how flashy a cheat is discovered or how many fingers are jammed, it is possible to continue the game. The only condition that determines victory or defeat is whether the water overflows from the glass.

Jotaro cannot be destroyed, stopped, or modified for any reason. Receiving punishment and losing the game are treated as completely separate issues.

And, an enormous prize has been prepared for this game.

The winner who succeeds without overflowing the water until the end will obtain enough wealth to become an oil tycoon.

Protect your fingers, or obtain the fortune?

Or rather, will you aim for victory even if you have to jam every single finger?

The players will challenge a mad coin game where anything is permitted as long as the water does not overflow.