Under One Person: Forced by Xia He to Master the Yin Five Thunders

Zhang Lingxian awakens in the world of "Under One Person" as a classic orphan—but his fate takes an unexpected turn when the legendary Old Heavenly Master discovers him. Raised on Mount Longhu alongside Zhang Lingyu, he's the senior brother by a mere three months, yet their destinies couldn't be more different. Armed with a daily sign-in system that rewards diligence and grants critical bonuses for missions, Zhang Lingxian is determined to rewrite the future. He'll ensure his junior brother masters the Yang Five Thunders, and when the enigmatic Xia He forces him down the forbidden path of Yin…