Responses

I just finished reading it and the ending is a bit confusing, shi yi disappear after getting stabbed then all of them got anxious, they search every hospital near them but there's no trace of him and weeks have already pass and they suddenly received a call saying that he is in a family hospital. Just like that, after opening the door, and seeing him opening his eyes, the story ended.
can someone pls spoil me like why is this sad? did someone died? got r*pe? or something? is it a happy or sad ending?