Yeah this isn't really a serious game but is not terrible as an Alt Tab/Window game while your doing other things.

My only real issue with it is that their isn't anything to burn excess energy on. It's easily possible to get stalled behind a Cash or Orb request for quite a while during which any excess energy just piles up and then you miss out on generation due to being full.

You can at least spend battle points doing pvp for a little extra XP and Coin or Bashing the Dark Lord (Had a Piece of Epic "Yellow" gear drop from him with a nice Stat Boost, Some affection & boost items, and he has hinted that he might drop a girl as well)

Also it's fairly easy to see that most people will probably quickly clear the all the available content very quickly then it will just be a question of do you bother to pop in to; Play Pachinko, Check the market, Get some coin from your girls, Do a few battles for xp to very slowly level up.

Still It's something I will probably put a token effort towards because once cleared you can always re-watch the scenes over and they are not without a little humor.