『Power fantasy + Cthulhu Mythos + multiple heroines + overwhelming invincibility + decisive slaughter』

…

Seven days later, doomsday arrives, but luckily you have a simulator…

『Apocalypse simulation has begun』

『Please choose one Talent from the following three: ‘Demon Contract (gold)’, ‘Resurrection of the Dead (gold)’, ‘Mirror World’…』

『…』

『Day 1, the sun no longer rises, doomsday comes as scheduled…』

『Day 2, the temperature plummets and civilians scramble for supplies…』

『Day 3, the safe house is detrimental to your health, staying less is the way to go… You act wildly, leave your own safe house, and search for the mysterious』

『…』

『Day 45, reality and dream are indistinguishable, you encounter a formidable foe… You die』

『The simulation has ended』

『Please choose one reward from the following: ‘Demon Contract’…』

By using the simulator properly, you can receive a powerful doomsday reward every day before doomsday.

Therefore, when the doomsday countdown ends, you are already absurdly powerful…