I dont remember main concept, but remember 2 things, its female protagonist game, probably with some kind of corruption system and part of plot was in some sort of academia to which you need to pay to enter and content in it was connected with studying magic and getting good marks from teachers by diff ways including H events . And if im not mistaking in acadimia was part of smth or smth you need for the plot. (Payment was smth like 10k or 100k, maybe it will help to identify