Mowang Daren, Ni Ge Han Ni Hujia Chifan

Also known as: 魔王大人，你哥喊你回家吃饭, Demon King, Your Big Brother Wants You Home for Dinner

by Baixiong Dao Er

Just imagine~ you'd just become the new demon king, drinking a little wine and singing before unceremoniously being thrown into the human realm. Not only did you lose your mana, you also became a little baby who has to live with a strange family. (Source: Manman Manhua, translated)