NastyCat

Rabis Vindica, the son of the Great Demon King who rules the Demon Realm. After acting on his own and wiping out a rebellious demon noble family, he is punished with banishment to the Human World. Living in the body of an ordinary student, Rabis soon discovers that the demonic power he should no longer be able to use still reacts to evil. As he gradually relearns how to wield his power, he begins searching for a way to return to the Demon Realm.

Kang Chiwoo lost his life in an accident and got reincarnated as the son of a great demon lord in another world. Unlike his previous life as a map designer, he is now a loser named Kella. However, in a world where magic exists and having realized the dormant power of Kella, Chiwoo sets out to achieve his goal of creating his dream map that he couldn't make in his past life... Will Kella be able to create his own map while fending off his brothers who constantly try to kill him, the countless threats upon his life, and the pressure of those around him who want him to succeed the throne?