Use software like 7-Zip or WinRAR to extract the contents.
Often listed in the creator's bio. General Guide for Handling RAR/Visual Novel Files Download One Week Hebe rar
If you have located the .rar file elsewhere, here is a general guide to preparing and running it: Use software like 7-Zip or WinRAR to extract the contents
If this refers to a visual novel or a creative project, please check the following common locations for such files: Download One Week Hebe rar