As you all know i am a pretty big fan of NIS America and the of Disgaea Series, and it all started with Disgaea 4. To see this complete edition. The game will come with a all the extra content and will have some as of yet unrevealed quality of life improvements, tho I assume they will be graphical and sound upgrades to what was originally a PS3 game.
The story is about an ex Tyrant and vampire, Lord Valvatorez, who has sworn to never again drink blood and has since fallen down the power scale of the Netherworld where he now trains Prinnies. This one will be worth playing I think, best wishes and may the gaming gods bring you glory.