你若是深海我愿溺死期中你若是孤单我愿伴你左右
[nĭ ruò shì shēn hăi wŏ yuàn nì sĭ qī zhōng nĭ ruò shì gū dān wŏ yuàn bàn nĭ zuŏ yòu]
An eloquent declaration of devotion, promising that if you're the deep sea (something dangerous or all-encompassing), I would be willing to drown in it. And if you're lonely, I will be by your side, expressing undying support and unconditional dedication towards their loved ones.