World: any

Harem: either way.

Description: A otaku suddenly has the ability to warp reality. However he's in a normal world! It's up to him to make his earth all that more interesting. Or better yet why not bend other anime worlds to his bidding?

Mc: Whatever you want.

Power: reality warping, though it's weak in the beginning. Able to do small things, before getting stronger as time goes on