That was the most normal of normal days that Harry has ever had and maybe he should have taken that as a warning. He went to visit more of his and his now-dead-bestfriends grand children's funerals and very old friends that are still alive and have some tea with them.
After the defeat of Voldemort, Harry Potter stayed 19 years old forever and that statement was found true after a hundred years passed and he still looked the same without a wrinkle or white hair on his person. He had the same energy as a 19 year old and the only difference between a hundred years before Harry and a hundred years later Harry is his magic and personality. Over time his magic grew and grew and grew and eventually they couldn't measure it.
This started a war. The Wizards and Witches were scared that Harry Potter, - The-Boy-Who-Lived, their savior, defeater of the dark lord, Master of Death (though most don't know that and those that do are dead from old age and illness) - would turn dark and become the next Voldemort just with more magical power. This caused a stir among people and Harry had to move away. His remaining friends that were still alive decided to come with him to explore the world before leaving to rest forever.
Years upon years Harry saw how the world died and resurrected and died again and so on. One day Harry had an idea.
What if he finished it?
What if after all his new friends have their peace he could follow after?
Those thoughts stayed for the next couple years and before he could diced to follow through or not the end of that normal day came and he died from a spell he didn't know about and he didn't get the chance to see who shot the spell at him. When he next woke up he was in the same white place as the last time he died but this time there wasn't any train or Albus fucking-too-much-names Dumbledore. No, but there was somebody else. A black hooded figure.
" Hello? " Harry called
" Ah Harry Potter, good for you to finally think to come and visit me. " The figure answered.
" Hmm... " Harry made a sound that signified that he was thinking and then finally answered " Death. "
" Hello master. "
" Well I didn't see this ever happening… "
" No you didn't. "
" So what's next? "
" Well you master will continue to live. This time in a different world. "
" … Why? "
" Because your last life was horrible and you need to live before you die… "
" … "
" … "
" The real reason Death. "
" ~sigh~ Am bored ok? And you were in the numb pain where you would either destroy yourself or the world. So I brought here and wanted to send you to a world where you would be happy. "
" … Ok why not. "
" Alright then good luck Master. "
" Wait you meant right now!? You didn't even explain what that world is like! "
" Well where would be the fun in doing that? "
" Deaaaaath! "
and Harry Potter was gone.
------------------
That was the beginning of what Death called a good show and Harry called a migraine (for now).