Synopsis

The newly appointed Demon King struggles to earn the demons' cooperation, discovering they begrudgingly obey his orders. He learns that physical duels are forbidden, but an "official duel" based on ancient teachings is permitted. The duel turns out to be a complex form of Rock Paper Scissors, involving predicting the opponent's hand and quick decisions. Despite being a seemingly childish game, the protagonist cleverly wins before the 'take one out' phase, forcing the demons to accept his authority and orders.