窗里年纪樱花结局
[chuāng lĭ nián jì yīng huā jié jú]
It implies looking back on youth from a current perspective as if looking out from a window; 'cherry blossoms' symbolize fleeting and beautiful times, suggesting youth, innocence, first love, or endings, probably meaning youth will eventually fade away just like cherry blossoms eventually fall after they bloom.