This is the Kingdom of Madrov, a country in a certain world. One day, a tomboyish princess escapes from the castle and is almost kidnapped. Then, a beautiful old knight in silver and white armor dashingly appears and saves her! Since then, the princess has been in love with the old knight. The reason is that the old knight was the former leader of the knighthood who still protects the country even though he has retired! Will the romance between the maiden princess and the handsome butler begin...?