Help! He and His Yandere Girlfriend Were Reborn as Brother and Sister!

In the last life, Chen Tang was caught by the yandere Feng Siyu and sank to the bottom of the sea because of his ambiguous affairs with many girls. After his rebirth, he had lingering fears and vowed to stay away from love and yandere for the rest of his life! "Sister, your brother, I have spent my life to come to a conclusion——" "Never fall in love with a yandere!" He spoke earnestly to his sister, but he didn't know that Feng Siyu had become his sister. "So, why don't 'brother' just talk to me? I am the only one who truly loves you!" 'Sister' quietly hid the kitchen knife behind her back and smiled at him.