Lovely. I just love letters as a way to get two unlikely people to communicate. Twit was adorable. I quite liked Severus's interaction with McGonagall as well (her discomfort over his most recent position at Hogwarts). The koi and snapdragons bit players in the garden. When they 'compared' scars, when Severus mentioned sins of the father, and Harry's reaction. I teared up when he told Severus how much he had meant to him with those letters. Gosh, just really sweet and romantic. Well done.