This is a sad love story. It doesn't have a happy ending like a children's story. And it's realistic. The protagonist lost his memory and a girl want to break into his life. By the way, you can pay special attention to the changes of the clock. It can help you understand this AMV.
Микс[ Your Lie in April, Kyoukai no Kanata,Tokyo Ghoul, Tamako Love Story, Weathering with You, Violet Evergarden, Hyouka ]