I'm planning on starting up an RPG world soon and want to know if anyone would want to help me decide which one to choose. My first idea is based on the anime Black Cat, and the other is based on Negima.

Black Cat RPG(no title yet)
20 years after the fall of the Chronos Numbers and the fight to stop Eden, a new group of Sweepers has risen and rebuilt the Numbers Organization. But even as the new Organization rises, a new evil has also taken form called the Gatekeepers of the End. Players can choose between either being a Gatekeeper, a Number, or a regular sweeper.

Negima RPG(not title yet)
Takes place about 10 years after the original storyline. A new school year at Mahora Academy and that means new students. Be they wizards, supernatural beings, or students with unique abilities, the school is about to get a bit crazy with the arrival of a new teacher who is an undercover Magi recruiting for a war being waged in the Magical World. Player's can choose between Magi(wizard/witch), supernatural being(vampire,werewolf, spirit,etc.), and unique student(for example: Mana, Chachamaru,etc.)

(Original Characters will still be present, as they will be in the college/university on campus or living in the magical world)

Negima: 1
Black Cat: 2