You used to hear a lot about this as one of those ultra obnoxious "wow it's so fucked! Japan is craaazy!!!" conversations that used to dominate the internet. Anyway, the game is kinda nothing. It's a fanservice thing and it does it's job just fine. It turns out all the "hooo fuck, how is Japan putting this stuff out?!?!" talk was mostly just thinly-veiled racism.