This is a RPG game.

When you wake up,
You heard the monster took your girlfriend
You are very sad
Decided to look for strength
Kill the monster and take back your girlfriend!
Actively talk to people nearby (there may be unexpected situations, such as getting props)
Weapons purchased require manual equipment to take effect
You can gain experience and gold by killing monsters in the wild
With gold coins, you can buy equipment in the field store (which can make you stronger)
When you feel stronger, try to kill the final boss