We're No Strangers To Each Other (гет)

In more than one dimension, Harry Potter managed to defeat Lord Voldemort, restoring peace to the Wizarding World and bringing it to a new age. In other dimensions, he hadn't done that yet, being too young.
However, in one certain dimension, Harry Potter did not defeat Voldemort. He was, in fact, killed by the Dark Lord while protecting innocents. While Harry's loved ones grieved him, the Order of the Phoenix got desperate and, using forbidden knowledge, decided to summon someone capable of accomplishing the prophecy and defeating Voldemort once and for all.
There was something they forgot however: the wards of Grimmauld Place stopped anyone from directly coming in or out of the building. To enter, you had to walk by the front door. As the ritual brought someone directly, it kicked them out on the front lawn in front of the house, which nobody thought to check. As they didn't know it worked, they tried the ritual again.
Thus, it was a very confused Minister for Magic Harry Potter who wakes up on the front lawn of Grimmauld Place. And, he's even more confused when even more Harrys begin appearing.
What the hell?