一季樱花埋葬了我们的誓言
[yī jì yīng huā mái zàng le wŏ men de shì yán]
Literally 'One season of cherry blossoms buried our vow.' It uses the brief bloom of cherry blossoms as a symbol to indicate fleeting promises that were made but not kept. It conveys a bittersweet moment of broken vows amidst the ephemeral beauty.