The remaster update is the next update of the game: It will be focused in, well, remastering the current content of the game. It will also include, but will not limited to add various animations for H and non-H scenes.
You can find way more detailed information in the devlogs right above us.
I can't give you an estimated release date for the update, as every time I try to do it, it backfires. So I'll most likely announce the release date one day before the release. To be sure everything is perfect and unpolluted