Divine Armored Battle Princess Polyphenol ~ The Exiled Holy Maiden is Genuine, So We'll Take It Back from the Evil Nobles Strategy ~

A mistreated princess is actually an agent for the nation's intelligence agency. When she opens a detective office in the slums, a request to recover a saint comes in. This is a story where she displays the royal holy mark on her thigh to make villains bow down. The saint she rescues is a lesbian. The princess's fiancé also gets involved in disguise. Also published on Kakuyomu.