In the Empire of Isletia, there is a saint named Serilta who came with a revelation that victory and peace will continue as long as they exist. At night when everyone is asleep, men who came to visit with a secret request try to tease Saint Serilta. However, they are beaten by Serilta who opened her eyes instead! ‘How can this be a noble and upright saint?’ Contrary to their expectations, two incubi and the crown prince fall for the tough and sexy saint, and hope to be beaten by her instead! The beginning of a thrilling and sexy high-level romance.