A Brand New Day
Also available as: Android mod
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
MC discovers the girls' secret problems, and like the helpful person he is, heroically saves them all from whatever issues they have. They are grateful and he gains their affection, but there's something happening behind the scenes!