After playing Custom Maid 3D 2 i didn't expect this game to stand against it, but it actually does in its own way.
Tip to those waiting for it to download/unpack/install: in the meanwhile go check on Hongfire the list of mods for it, most of them are custom clothing, hair, personality and gameplay enhancers (but nothing for events and additional stuff to do unfortunately).
Edit: I also strongly recommend AA2 Unlimited, a mod that adds a huge amount of functionalities, extras and, most importantly, personality modules: these modules are basically scripted traits that create custom events and add interesting traits to both NPCs and PC.
Now to the actual review.
The game offers various way to pass time: simulate a japanese school life, interact in many different ways with other students and teachers, get a partner (or multiple ones) and enjoy H-stuff.
Artificial Academy 2 was pretty intertaining for about 15 hours or so (including modding and fooling around with cheats) but after that it gets a bit boring due to the limited amout of content.
I strongly raccomend it nonetheless as it is actually pretty good for an H game, and worth mentioning that it is fully translated.