The Grim Apocalypse Approaches, Luckily I Have a Simulator

Seven days later, the apocalypse arrives. Luckily, you have a simulator...

[Apocalypse Simulation Started]

[Please choose one of the following talents: 'Demon Contract (Gold)', 'Resurrection of the Dead (Gold)', 'World in the Mirror'...]

[...]

[Day 1, the sun no longer rises, the apocalypse arrives as scheduled...]

[Day 2, the temperature plummets, citizens scramble for supplies...]

[Day 3, the safe house is harmful to health, staying less is the way to go... You are bold, leaving your own safe house to seek the mysterious]

[...]

[Day 45, reality is no different from a dream, you encounter a powerful enemy... You are dead]

[This simulation has ended]

[Please choose one of the following rewards: 'Demon Contract'...]

You use the simulator wisely, and every day before the apocalypse, you gain a powerful apocalyptic reward.

Thus, when the apocalypse countdown ends, you are already outrageously strong...

(Harem + Cthulhu Elements)