The Savior Magical Girl Is Actually My Scheming Childhood Friend

Magical girls keep Lin Xiu's world at peace, but none of that has anything to do with him. At least, that's what Lin Xiu thought, until he was forced to sign a contract of servitude. His scheming childhood friend lusts after his body in everyday life, while perverted villains lust after him in battle. Is there anyone normal in this world?