Description: At the end of season 2, note that Yuuri return trip from the earth to the kingdom of Satan using the power of Shin’ou. Since Shin’ou has died at the hands Yuuri, he and his friend Ken Murata could no longer go to the Shin Makoku. However, Murata seems to have learned that, if you can beat Shin’ou Yuuri, Yuuri had the means to their own strength to get back to Shin Makoku. And Murata true.
After the ceremony at the age of 16, Yuuri slowly begins to discover that much has happened while he was away: when Yuuri is on Earth, the ten officials of nobel family have decided Wolfram as Demon King. And now Yuuri come to Shin Makoku again and sat back in his position as Demon King. Complications arise when the one of the nobles did not agree if Yuuri becomes king again.
And the rise of an ancient secret society that threatens the peace of both humans and Mazoku, and a fight for the throne that now leaves the nobles wondering who is the legitimate Maou.