Anyone else but me heard of this one?
I haven't played through all of it, but I've played through a lot of it.

Basically in the game you play a character by the name of Lyner, who is one of many people who's life depends on the Tower of Ar Tonelico. However, the tower starts being attacked by viruses. Lyner goes on a mission to figure out how to get rid of these viruses.
On his journey, he ends up being partnered with these song maidens called Reyvatails, artificial intelligences that take songs and turn them into magic. It's pretty cool.

It's a lot of fun, and has an interesting battle system and concept. Not to mention if your into a dominant/submissive lifestyle, this is definitly a game for you.
Don't worry, there is nothing extremely sexual, but there are a lot of double entendres.

Great game, just don't let a child younger than 15 play it.