明明是你先追我的当初是你先告白的
[míng míng shì nĭ xiān zhuī wŏ de dāng chū shì nĭ xiān gào bái de]
This means 'You were the one who pursued me first and confessed your feelings first.' It refers to recalling events of a relationship initiation, emphasizing how the initiative came originally from the other side.