Harry is a single father trying to raise his godson, Teddy. Unable to ensure his son's safety in the wizarding world he goes into hiding in the muggle one. But one trip to London will undo all of his precautions. Thrown back to the past, Harry will take up the DADA position and fall into the arms of a woman who once spared his life. No time paradox, Light/Badass Harry. T/M rated.