Plus the third game has girls stripping to become stronger. The second game has BATH FUNTIMES to get the girls stronger, and you ~*install*~ into the girls in the first game.
Yes, it's chalk full of sexual innuendo.
And for EP: If you thought Hymmnos sounded weird before (that was all Pastalian Hymmnos and that is the devil incarnate), I submit to you some pure Hymmnos songs that sound awesome and amazing:
EXEC_HARMONIUS/. and EXEC_SPHILIA/.
...did I mention that the girls strip in order to power up their songs in the third game? Because no, they really do. (And don't feel guilty, they're all of-age, no matter how young they look!)

