Pretty good story! I really like the storyline, and the idea of Bumbledore chasing the two of them around, and unable to stop them is just hilarious.
You do have a number of spelling and grammar errors, so I would recommend getting a beta reader to help you to locate and correct them. Since I haven't found a beta reader list here, the following is a list of betas from another Harry Potter fanfic site.
Author's response
Um there is no list, please email me them.