Ruobai "accidentally" entered the demon world and was sealed in the inner abyss like other demons. He knew that he could never get out again. The evil poison invades the body day by day, and before the demon comes to attack, I am afraid that I will be poisoned to death first. This life was supposed to be so careless, but I didn't expect to meet a, uh, a blood demon... And make a bunch of friends. So, he unconsciously became a member of the demon tribe...
Intention: bond