The sunny boy in Cardcaptor Sakura

Cardcaptor Sakura fan fiction, without Wolf Sakura, the heroine is Tomoyo.
Q: What if I woke up one morning and turned into a child?
Answer: Of course, to become a sunny and cheerful boy!
Xia Yu covered his eyes with one hand and smiled evilly, "The top of mankind, proud of the world, as long as I am Xia Yu, there will be heaven! I, Xia Yu! A magician hidden in the mortal world, in this magical world shrouded by the veil of daily life, I am the chosen one who can see the truth, holding the sun and the moon in my hands and picking the stars. There is no one like me in the world, hahahahahaha!!!"