What Could a Little Succubus Do Wrong?

Lucia came with a BGM System and transmigrated into the body of a little succubus. By chance, he slammed the newly revived Demon King right back into his coffin. When Lucia emerged from the altar, the abyssal demons mistook him for the Demon King's new body. They escorted him to the throne, respectful and fervent: "Your Majesty, let's go out and scavenge some food!" "Your Majesty, if you don't wake up soon, they'll take our last bit of territory!" It was Lucia's first time being a Demon King, and he had no experience. So he could only complete the System's missions, draw a BGM, and play it on repeat: He drew "Son, I'm Your Dad," and the invading enemies retreated in tears; He drew "We Workers Have Strength," and the dwarves built a food processing plant; He drew "I'll Love You Even in Death," and the Demon King's horns twitched inside the coffin... Lucia's territory grew larger and his subjects more numerous. United as one, they eventually modernized the Abyss. #What could a little succubus possibly do wrong?# #The little succubus just wants an ordinary life with food delivery and gaming!# Side story: The Demon King emerged from his coffin and stared at the unfamiliar world, utterly bewildered. A few succubus big sisters thought he looked good and dragged him into an alley: "Out of work? Why not come work for us?" "Don't be afraid, it's an honest job. Room and board included, and the more you do, the more you earn." Not long afterward, Lucia went to inspect a coal mine after a collapse. In the mine, he found the missing Demon King, who had been gone for days. The mining Demon King: hardworking, brave, and innocent "Why are you here?" Lucia asked, slowly approaching. The Demon King quietly hid the pile of coal he'd dug behind his tail, the tips of his ears turning red. "I want to support you with my own two hands." Couple: little succubus x great evil dragon Theme: Fearlessly pursuing your dreams