This is a slow-motion story about Harry Potter traveling back to 1938 after the war, meeting the reborn Albus Dumbledore, and the intersection of Tom Riddle (Voldemort). Harry became the Professor of Defense Against the Dark Arts, while Dumbledore remained the Professor of Transfiguration. The two had a common idea, which was to straighten little Tom. Don't let little Tom take a detour again... The past and the future are intertwined, and the complicated truth - will the future... Change? (There are weird CPs in it - HP-AD, AD-HP, AD-TR, TR-AD, HP-TR, TR-HP, all can be reversed, but in the end it will be 1V1)