Boob jokes and penguin-like characters, that’s Disgaea in the eyes of the ESRB. The US cover art has a bit of info as well. Mao and Raspberyl from Disgaea 3: Absence of Justice are in the game too.

The PSP Go comes with a neat addition for parents or those who take care of small children: a crash course on the ESRB ratings and how to use them. A neat feature that's easily removed if unneeded ...