The Apocalypse Has Arrived, and I’m Slacking Off with the System Lord

【Satisfying power fantasy + male lead + equally matched leads + devoted to each other + golden finger + absolute safety】 After getting her head caught in a door, she unexpectedly awakens a cheat System. While everyone else grows thinner in the apocalypse, she gets rounder and rounder... and even starts thinking about losing weight... When the people who try to steal her supplies are kicked out by the house one after another, they are left in shock!!!! What do you mean, the house is sentient too?!