Wait what? It ended? Well this is an axe if I ever saw one. All it took is falling down D. Stairs to repair his relationship with his grandpa and regain his memory of Aoi, that felt extremely rushed
Also, I hate the trope that they had to not meet for five years so he can become worthy of her, a lot can happen in five years, people can change, accidents can happen, a lot of uncontrollable things, etc...