Smile or They'll Know I'm Human: Undercover Among the Mimics

Chen Mo suddenly finds himself in a school full of mimics, monsters wearing human skin. Here everyone must smile at all times: fail to smile and you are exposed as human and destroyed on the spot. With a rare power to blend into whatever surrounds him, he must collect Red Flower badges and survive until graduation. But hidden inside him is a pure-blooded dragon power strong enough to crush even the Awakened.