Copywriting: Those who have obsessions in their hearts and persist until death enter a thought-washing pool in the demon world. If the thought-washing pool cannot wash away their obsessions, they become demons. Demon Lord Yu Ran forgot his obsession with becoming a demon and was reborn as a frail and sickly 5-year-old child, who opened a B&B with Cheng Chi. The absence of the Demon Lord in the Demon World led to turmoil in the Demon World and monsters endangering the human world. In the process of exterminating the demons, Yu Ran and Cheng Chi slowly remembered their obsession with becoming demons.
Unserious version: "Ranran, come on, let me protect you!" Cheng Chi extended his claws towards Yu Ran.
"I'm your grandpa! Ahem..." Yu Ran was so excited that he coughed. I count it as more than 100 in the human world and more than 1,000 in the demon world. How could he be his younger brother?
Concept: All encounters are reunions after a long absence!