My Beast Is the 12-Winged Angel: Book 1

Transmigrating into a different world where Guardian Beasts reign supreme, Gu Xing is supposed to be the chosen one envied by all!
The first Guardian Beast he summons turns out to be a rare Epic Level Succubus!
However, just as all eyes are on him, this Succubus betrays him in public.
"Master, he's offering too much!"
She then turns to the embrace of a rich heir, leaving behind a scene full of ridicule.
Yet no one knew, Gu Xing has awakened a system that could see through all Guardian Beasts' training paths!
Amidst the laughter of the crowd, he contracts with an Angel deemed "crippled."
After using materials to heal her wounds, the Angel fully recovers...