Re: [みじいし] アモル魔法学園 (so I heard you like NTR)
So without spoilers, here's a more detailed list of add ons.
New dungeon: has no unique defeat scene, and pretty bland. Nice exp spot though.
New events: focused on Remina quite long and multiple h scenes.
New weekend activity: Sat has new Remina scenes. Correction: Lini has a Sunday scene while Sakura has a Saturday scene.
New mechanic: whether a girl is someone's lover or meat toilet actually matters now. New options for them being yours and slight change to daily scene if they are someone else's. Of course, Remina has more.
Cameo finally added! Now waiting for Final Fantasy reference.
AE: not as I thought it would be. I was hoping it would be the entire game, but it's only one scene per girl. A shame, since after finding one it just seems like the game was meant to be animated like that.
Just know that to start the new events Remina must be your current lover.