It's easy. Here in America we've things called, "Drinking Games." We take things of alcohol and watch a given movie or television show.
If we know of things that happen often in the show, a rule is made that one has to do a shot of hard alcohol or a simple drink of beer or some such thing.
We know that in Kamen Rider 555, someone loses their belt almost twice every episode, so that's two shots to do with your friends.
And so forth.
No one would do a shot everytime Nozomi said, "Mutsuki" or else they'd die. So instead it'd be a drink everytime she said that damned name.
Get it?
We're not playing the game right now, we're coming up with rules for it.