You typically don't "install" the site itself, but there are third-party scripts like the Weloma Download script on Greasy Fork that add download functionality to your browser via extensions like Tampermonkey.
Accessing can be done through various online platforms that specialize in hosting raw manga chapters. These platforms often provide scans of the latest chapters, allowing fans to stay current with their favorite series. Here are some steps to follow: read manga kujo no taizai raw chapter 120 raw weloma install