Quick Transmigration: I Became the Second Male Lead's Little Brother

What happens when you wake up as a supporting character's adorable younger brother across multiple worlds? Armed with nothing but charm and a three-year-old's innocence, our protagonist navigates dangerous plots, melts cold hearts, and becomes everyone's treasured little darling. From ancient dynasties to futuristic realms, watch as this pint-sized scene-stealer rewrites destiny one world at a time—all while being doted on by powerful brothers who'd move heaven and earth to protect him.