So, anyone who has played both... The remake and the OG is pretty much the exact same game right? With only art and UI changes?
Gameplay
The game is iirc entirely linear. You enter a room, interact with an object such as your desk, or bed or the shower, a scene plays, and afterwards you have to interact with the next object to see the next scene.
Story
You are a student that moves into a small apartment house with four beautiful fellow students as well as adult women. Soon after you move in you learn that your "roommates" are sexual deviants you assault you whenever they want however they want, slowly turning you into a human vegetable.
H Content
Beautiful, sexually more experienced women abuse a totally overwhelmed male character. If that's what you are into this is the game for you.
Compared to the original the artwork has been improved. Also, the boob sizes of the women have been turned down to less ridiculous sizes; from like quadruple their heads to "only" twofold. Personally a good change.
Changes compared to the original
As already mentioned, the artwork has been improved. Several very welcomed QoL changes, e.g. a fast skip of dialogs to get to the "good parts" have been added. Also, two entirely new scenes have been added.
Conclusion
If you are into sexually dominant women and don't mind a game with virtually zero actual gameplay this is the game for you.
If you already own the original game you have to decide whether it's worth the upgrade for yourself. In my opinion It's worth it.