The student council trio, Izumi, Miki, and Risa, check in on the Sanzenin Mansion to see what the new butler is like. When they arrive, Miki picks up a controller and, along with the other two, gets pulled into a game world set up by the demon of Nagi's Famicom!
Well, to put it simply, 
that's what it comes down to.
Bueno, si quieres resumirlo, 
se podría decir eso.
Sendo honesta, é exatamente isso.