Harry potter and the time-dimention turner

Four years after the war, Harry decides that everyone needs a second chance. He chooses to go back to the past, in an alternative universe, adopt the future dark lord, and give him the childhood he deserved, bringing back with him Teddy Lupin, his godson. But one anti-social, possessive, and obsessed with him Tom Riddle wasn't what he expected. Tomarry/ rated M for future slash.