Who Is the Devil? I'm Not the One.

Rand, who traveled to another world, became the noble youngest son of the Demon King, but the problem is that the Demon King has more than 300 children! Due to the fierce competition among the Demon King's heirs, even if a dog comes, he will be slapped twice, so Rand, who has always disliked trouble, has to take action, but his cultivation talent is not high. He looked at his five-meter-tall brother, and then looked at his brother with six arms and two heads. Rand, who looked particularly weak, pitiful and helpless, had to change his strategy again. Since he couldn't use force, let's use his brain...