In the green years of high school, she watched him silently in the corner, and the seed of secret love was quietly planted. He was so radiant that he never noticed her feelings. After graduation, she entered the normal university and he entered the military academy. Although the distance is far, the fate is not broken, and the secret love of the past slowly ferments over time. They work hard to grow in their respective fields, and the memories of their youth are intertwined with the thoughts in their hearts, making this relationship more mellow. From school uniforms to the long life ahead, can they overcome many obstacles and compose their initial ignorant love into an eternal love song?