The Fetus Turned into a Useless Legitimate Son, and I Won the First Prize in the Imperial Examination with My Sister

On the day he took the postgraduate entrance examination, Lin Mo was hit by a truck and died, and he was reborn in ancient times with endless regrets. When he opened his eyes, he became the second son of Shen Mansion in Dajing. My sister is the most talented woman in the capital and attracts everyone's attention; And he just wants to show off...