Hi. You have to unzip the content of that zip ("patch.rpy" and/or "patch.rpyc") in the folder called "game" inside the HardtoLove folder.
Great! How will I know if I applied it right? Like I don't want spoilers, but what scenes in what chapters will change?
Hi. What it changes is the text, the relationships between the characters.
Ah, yeah, I'm pretty sure it worked.
