Anna who has been depressed since her twin brother died many years ago ,she couldn’t help soaking herself in the memories with his brother,even built a shelter to keep all the things together,photos,videos,etc.She left a lock of hair the last day she with his brother,which touched me deeply.Fortunately,this is a happy ending with tears in my face.
It's like Claire's Knee, only until the last frame, we understand the film title. We forget about everyone else and even the story itself, but watching the boy in front of us, with a white balloon on a stick.