I Picked Up This World's Strategy Guide

Story

Sana is the hardworking daughter of a shop owner, and she often ventures out into the forest to gather the herbs needed for the restorative potions they sell. But on one trip, she happens to pick up a mysterious strategy guide for a game—and it's filled with detailed information about her town, those around her, and even what's yet to come! Except, the future may not be at all what she expects… With such a powerful—and dangerous—book in hand, what will Sana do?

Synopsis via AniList (English).