No bugs? There are plenty as well as other issues. Clicking on some places with one character leads to scenes in another area with a different character. (Rachel in Park went to Vera in Restaurant). Clicking on character info on the screen can result in it being stuck. Senning looks like a purple alien or severely bruised, her hue is off so bad in some of her scenes. Characters are completely absent in some of their dialogue for multiple lines.
For a harem simulator, there is also no real harem going on here anywhere. You basically have an MC that just fools around with no clear attempt made to actually build a harem. Dev should take a lesson from games such as Harem Hotel, Mythic Manor, Sisterly Lust, to see what harems actually look like. There is no real fun factor here or anything to really hold interest, when I found it starting to be more painful with progression it was time to go. It's just a mess of a game with no solid concept with what it tries to be, a very cheap UI with a generic grinding scheme, and less than moderate porn content. Assets have also been taken from other games, mostly from The Headmaster.