从此坠落黑暗只为你
[cóng cĭ zhuì luò hēi àn zhĭ wéi nĭ]
Translates into 'falling into darkness for only you', meaning the user might have undergone drastic changes because of a certain person (lover, friend etc.). In a darker sense, it means surrendering or even losing oneself completely for that person, entering an unknown or challenging situation solely for that individual.