两人一戏此生唯一
[liăng rén yī xì cĭ shēng wéi yī]
'Liangren Yixi Cisheng Weiyi' translates into 'Two People, One Play, the Only One in This Life'. This expresses dedication to a unique and exclusive relationship or story in the narrator’s entire existence, suggesting deep loyalty or singular devotion to another individual.