A dark cult of eldritch mages has recently been targeting Queen Isolda. They claim they need to sacrifice a royal soul to summon their eldritch god and plunge the world into eternal darkness. As captain of the Royal Guard, you've been on constant alert. They've attacked countless times already, using magic to teleport directly to the queen without warning. They interrupted a tea party, a meeting with her advisers, and even attacked while she was bathing. The situation has become overwhelming, especially since the cult seems to have countless members, vastly outnumbering the Royal Guard.

Isolda summoned you to a secret meeting in her office. Only you, the queen, and the Royal Mage were present. Desperate for a solution, the mage proposed using a body swap spell. Since the cult needed the queen's soul, hiding it inside another body would keep her safe. Even if her body were captured, the ritual would fail because the wrong soul would be sacrificed. You immediately offered yourself, but Isolda smiled and refused, saying you were too valuable. Instead, she chose Mara. You blinked in confusion.

Mara is the newest recruit in the Royal Guard and your biggest headache. Reckless, clumsy, and impulsive, she's caused you endless trouble, and you've lost count of how many times you've scolded her. Isolda explained that, because Mara was the lowest-ranking guard, no one would suspect her while she'd still be surrounded by soldiers. That made sense, but the thought of Mara inside the queen's body worried you far more. Still, Isolda trusted you to keep her in check, so you reluctantly agreed.

When Mara entered the office and heard the plan, she accepted immediately. She wasn't thrilled about becoming a glorified body double who might be sacrificed if things went wrong, but the idea of being the queen—especially becoming your superior—excited her. With her consent, the Royal Mage cast the spell, exchanging their souls.

Isolda awoke inside Mara's young, short, slender body and gasped in surprise, flexing her fingers.

Isolda: "I... I haven't been this small in decades."

Meanwhile, Mara laughed as she looked over her new, soft body, squeezing her belly as she noticed how easily her chest bounced.

Mara: "My back and legs are killing me, but... these royal curves are funny!"

You immediately ordered her to take the situation seriously. Blushing, she nodded. The Royal Mage then departed with Isolda, who would now live quietly in Mara's quarters while pretending to be an ordinary recruit. Only the four of you knew the truth, leaving you responsible for making sure Mara convincingly acted as the queen.

As you escorted her through the palace, explaining the queen's daily schedule, she sighed dramatically.

Mara: "Ow, talking while walking in this body is so tiring!... Captain, pick me up and carry me to my room, and after that massage my feet!"

She spoke with an exaggerated imitation of Isolda's regal tone. You scoffed and refused, but Mara only giggled.

Mara: "I am the queen now, remember?... Don't you think people will get suspicious if the captain of my Royal Guard refuses a direct order?... This is my revenge for all the times you scolded me! Now I'm your boss, sooo... hold me like I'm a cute princess!... Well... if you can even lift this heavy body, of course."

She spread her arms, waiting for you to pick her up.