Most mods install on top of a fresh copy of DDLC, free from ddlc.moe. Follow the author's instructions, and keep a clean copy of the game.
About this mod
this mod solely exists because i wanted to parody that video. its better if you go in blind, but if you need to, heres the link: https://www.youtube.com/watch?v=2ik2B6raCjY
also, i have to add a severe cringe and mild violence warning