The Hajimari no Kiseki Config resolution setting bug in Steam, which allowed players to select an invalid resolution in the Windows 10 display settings, has been fixed.
After the fix, the Hajimari no Kiseki Config resolution setting will display a resolution that is lower than those which can be selected in your Windows 10 display settings.
If you have selected an invalid resolution NOT shown in the modified Hajimari no Kiseki Config, please reset your resolution.
Additionally, if you are using a widescreen display larger than 16:9, you may need to change the scaling settings on your display in order to play the game in the correct aspect ratio.
We sincerely apologize for any inconvenience this may cause.
Resolution Settings Fix
Source: Steam Community (opens in a new tab)