恋爱是我不断沉沦的开始甜蜜是我不断沉沦的过渡
[liàn ài shì wŏ bù duàn chén lún de kāi shĭ tián mì shì wŏ bù duàn chén lún de guò dù]
The username describes the process of falling deeper into love; 'love' as the initiation, 'sweetness' acting as a transition towards further infatuation or obsession. It poignantly captures romantic feelings evolving from initial spark through the blissful phase towards something even stronger.