The Dragon Lord's Real Daughter

After being released from prison, Dragon Lord Arvin An learns his ex-girlfriend gave birth to his daughter. While searching for his child, he accidentally swaps souls with high school student Ethan. Using Ethan's identity, he enters the campus, subdues school bullies and confronts the campus beauty. After a series of incidents, he discovers that the "fake rich girl" campus beauty he has been targeting calls his ex-girlfriend "mom".