Never Ending Tomorrow
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
You, as the protagonist of this story will have to face difficult decisions. A former entity speaks to you, warning you of future events. It's not who you think it is. As mystery fills the air you will have to choose one, or lose all.