Prologue

"This is stupid, why must we sign this contract?"
"Because once you become a guardian angel you cannot regret it."
Six strong kingdoms; Six different princes; One endless war.
It's up to six girls to guide the princes to lead their kingdoms to find peace, will they fulfill their destiny? Or will they just make things worst? But there's a secret behind these princes that no one, not even themselves...

Based on PPGZ