Special Days
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
The mod has branching choices and there are two major routes. The main "Monika route" continues through the festival. The other major route is the so-called "Sayori glitched route," which in actuality has little to do with Sayori. There are some secrets within the mod.