Gabriel Is Actually by My Side?

Orphaned as a child, Xiao Bai's parents left behind only enough money to see him through his education. But Xiao Bai had never wanted to go to school. Through some special channels, he spent a little money on a university diploma and planned to stay home and rest for a while. Then, when Xiao Bai got up the next morning, he found he had gained a little sister! The angel Gabriel... Little did he know that his ordinary life would gradually slip away... This was only the beginning.