Three Hundred Years of Sign-Ins in the Demon Realm: I Became a Human Spy

Lin Feng transmigrates to the Demon Realm and activates the Sign-In System.

"Sign-in at the Demon Cave successful. Obtained the Heavenly Demon Sacred Veins."

"Sign-in at the Demon Realm Ruins successful. Obtained the Myriad Demons Compendium."

"Sign-in at the Dragon's Roar Hall successful. Obtained a set of Ziwu Seven-Star Armor."

After signing in around the Demon Realm for three hundred years, Lin Feng has become the Demon Sect's Holy Son and amassed a fortune beyond measure.

Life couldn't be more comfortable.

But all that changes when a shocking plan is set in motion in the Demon Realm.

Lin Feng is sent to the human world as an undercover agent...

Many years later, war breaks out once more between the human and demon realms. Only Lin Feng can turn the tide, and the powerful figures of both realms turn their eyes toward him...

Lin Feng: "I don't care if you're human or demon! If you don't want to die, get behind me. I'm going all out..."

The blurb is weak! The story itself hits hard!

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.