A Few Spoilers...

This story will be sort of similar to FF7. Why? Because this involves the world ending at 2012 in a way that Sephiroth intended to do by summoning a genocidal meteor. Also, here's how it works:

Hayate will be filling Cloud's role as the main protagonist.

Negi will be the second protagonist but will not be filling any of the FF7 cast.

Luca, I think, is suitable for Aerith's role. Those who are wondering if she will share Aerith's fate in FF7, fear not, NO ONE, or at least NO ONE in the main characters will die.

The main antagonist here will be an OOC named Sera. When it comes to appearance, Sera looks exactly like Hayate except that his hair is dark blue and so does his eyes. So I suppose you can think of him as an evil version of Hayate. And in contrast to Hayate, Sera always has a serious or angry facial expression .The name "Sera" actually came from the angelic name Seraph. Kinda similar to Sephiroth right? And like Sephiroth, Sera is suffering from insanity. He is a product of the ... ...Well, in FF7 it's called Jenova Project but in here it's-

Jehovah ,who is an OOC antagonist, will be filling Jenova's role.

Athena will be filling Minerva's role but not as a goddess but rather a powerful persona-user from an ancient race known as the Ancients, the Cetra in FF7, and she will be ,at first, an antagonist until much later in the story as Hayate will save her from Sera and she will fall in love with him.

Machina will be Athena's most faithful follower. I suppose he will be filling Genesis's role.

Evangeline in this story will be a sister of Athena. The two of them will fall in love with two protagonists, Hayate and Negi.

Oh, and also, I will be substituting the black materia as an important item called The Jewel of God that is at first believe to be an item that will lead to the "Promised Land" until later when Sera revealed its true purpose. It's actually a genocidal item that can summon a diobolical meteor that is capable of wiping out the entire planet. Athena and her sister, Evangeline, are after it because they thought it will lead them to true power but then Sera will come and reveal its true nature and then he will take it from them and proceed to summon Meteor as he believes that the Promised Land can only gain when all life vanished since in the beginning, humans were the caused of negativity being brought on the world. Also, The Jewel of God is actually created by Jehovah which she named "The Jewel God" since she delusionary believes herself to be a new God.

Well, that all for the similarities to FF7. The next thing I'm going to explain is that even though this is a cross over of Hayate no gotoku and Negima, and perhaps even FF7, I still consider it as an Hayate no gotoku story since most of the story settings will be in Tokyo and that there will be more Hayate no gotoku characters than that of Negima. Also, I will add some OOCs that will fill Vincent Valentine's role and that of Lucrecia's as well. The last OOC will be a resident of the velvet room named Judas. You will know why his name is like that as you read the story. Well, enjoy!