我爱的男生应有最美的笑容
[wŏ ài de nán shēng yīng yŏu zuì mĕi de xiào róng]
This username 'Wo Ai De Nan Sheng Ying You Zui Mei De Xiaoli' means 'The boy I love should have the most beautiful smile.' It expresses deep affection and admiration towards someone special.