If the player adjusts it, they can go up to 10, 20, 50, or even 100 years after the present day.

There is a calendar that sets the time from the present day of the computer. Rather than a focus on narrative development, the primary focus of the game is extended interactions with Monika and simulating the experience of being in a relationship with her. Monika After Story has been described as a 'Girlfriend Simulator,' in the vein of games like Love Plus.

After a short introduction, Monika proceeds to sit with the player, randomly discussing different topics, playing mini-games, and otherwise killing time. After the events of Doki Doki Literature Club, the player installs a mod that restores Monika and the world she created for herself and the player.