My Rebirth Is a Nightmare for My Adopted Son and Fiancée

I was reborn. My face was swapped with yours in the previous life. You became the heir to the Huang family. I became the son of that mistress and was despised by others. My biological parents preferred you even though they knew I was their biological son. My girlfriend also got involved with you. In this life, instead of explaining my identity, I will use your identity to defeat you.