The game includes the newly reborn, Mary Skelter: Nightmares. In order to enjoy the revisited game to its fullest, we designed the game so that you can enjoy it after clearing Mary Skelter 2. However, you can still unlock Mary Skelter: Nightmares with free DLC if you'd like to play it before completing Mary Skelter 2.
Once Mary Skelter: Nightmares is unlocked, you can toggle between either of the games at the title screen.
It is entirely up to you which one to play first, but...
We recommend playing Mary Skelter 2 and then Mary Skelter: Nightmares.
Princess, I heard you can enjoy both Mary Skelter 2 and Mary Skelter: Nightmares with this game!
Oh, Otsuu? Did you know that you can download the free DLC, "XXXXXXXXX?" You can play from Mary Skelter 2 if you get it.