Frank didn't want to be at the doctor's office. He thought that a little bit of ambrosia or nectar would have been sufficient. But Reyna had insisted.
"It's protocol for all Praetors and Centurions", she had said. "Whenever they are injured, they need to get a health check-up to make sure they are capable of remaining in their post."
So, without a choice, Frank had made his way to Dr Mason. Sitting in the reception area, he scowled down at his arm. It had been broken last night, but had been quickly healed. He flexed his muscles, and didn't feel any pain. Frank knew he was totally fine.
When he was called, Frank marched into Dr Mason's office. The doctor looked up from a file on his desk, and smiled.
"Welcome, Frank", he said. "Reyna has told me about you, and it's a pleasure to finally meet you in person."
Frank blinked. This wasn't what he was expecting.
"What do you mean?" he asked.
"I'm the doctor on call for any situations where Camp Jupiter needs a real, medically-trained doctor, and not just some magic food", Dr Mason replied. "I can see that you look quite healthy, so this should be mostly a formality. Please sit."
As Frank sat, Dr Mason stood, and picked up the staff that lay on the desk in front of him.
"This is my asklepian", he explained. "I'm going to use it to help me see if there is anything wrong with you. Is that alright with you?"
Frank nodded. Dr Mason tapped him lightly on the head with the staff. For a moment, Frank's eyes blurred, but then the world cleared.
"And?" Frank asked anxiously. "Is everything normal?"
Dr Mason didn't reply. Frank looked up, but the doctor was seated at his desk again, filling out some paperwork. Frank tried to get up from the chair, but to his horror, he found that his arms and legs were tied with ropes spun from an alloy of Celestial Bronze and Imperial Gold. He frowned at the bonds. They hadn't been there before, when he had sat on the chair.
"What's going on?" Frank asked loudly.
Dr Mason looked up briefly, gave Frank a distracted smile, then looked down again. Furious, Frank strained to break his bonds. His muscles bulged, but nothing happened.
"Let me go!" Frank shouted.
The anger in his voice was nearly palpable. Many lesser demigods and monsters would have quailed under he wrath of a son of Mars. But Dr Mason was used to tantrums, demigod or not; he was the focus of them every day. The doctor looked up at Frank again, his smile warm and understanding.
"There are still a few more tests to run", he said calmly.
Frank roared, and tried to shapeshift free of the ropes. But no matter what shape he took, the ropes changed shape with him. Finally, Frank slumped, exhausted, in the chair, back in his human form. Now, Dr Mason stood, and walked around his desk to stand in front of him.
"If your tantrum's over, we can get some tests done", he said.
Frank glared at the doctor, but didn't speak. Dr Mason reached down, and ran a finger down Frank's chest. That action was like a switch; Frank suddenly realised that he was naked. He paled in shock as he racked his brain, trying hard to remember when he had stripped out of his clothes. But try as he might, Frank's mind was blank.
"What have you done to me?" he asked the doctor accusingly.
Dr Mason smiled. His hand continued to trace Frank's muscles, going lower and lower until he was circling the demigod's cock. Frank squirmed under his touch, but the bonds held him in place. Dr Mason held Frank's cock in his hand as he finally answered the Praetor's question.
"I haven't done anything", he replied. "In fact, everything here was your idea."
"What?" Frank exclaimed. "I don't believe you!"
"I didn't think you would", Dr Mason said, "but you asked me to make a video."
With his free hand, Dr Mason picked up the asklepian, and tapped his desk with it. Immediately, a screen rose smoothly from the middle. Dr Mason tapped the screen, and it flashed on. Frank stared into his own face.
"Hey!" Frank heard himself say cheerfully on the recording. "This is a recording for Dr Orpheus Mason, outlining my wishes. I want to be tied up, and lose all control. Dr Mason can do whatever he wants with me."
The screen flashed to black, and then slid back into the desk. Frank stared at the place where the screen had been in horror.
"That wasn't me", he whispered.
"Yes, it was", Dr Mason replied forcefully. "And from only a few minutes ago."
"Well, I've changed my mind", Frank protested. "Now I want you to let me go."
The smile the doctor gave him was not at all pleasant.
"I don't think that's how it works", he explained. "I have evidence of your wishes. If anyone asks, I can show them this video of your consent."
"But… but…" Frank mumbled.
"But nothing", Dr Mason said with finality.
Frank slumped in the chair, realising that he had lost. He felt drained; all the fight had gone out of him. Frank didn't even struggle when Dr Mason began to stroke his cock, slowly bringing up to full mast. Then, without warning, Dr Mason tapped Frank again with his staff.
Frank blinked. He was still tied up, though no longer to a chair. He was standing with his hands were tied behind his back, and his legs spread wide. Frank froze in surprise, but jumped as he felt something cool and wet press against his ass. He tried to turn his head, to see what was behind him, but couldn't turn far enough. The object pressed against Frank's hole. As it breached his asshole, Frank let out a whimper. He heard quiet laughter from behind him, and felt one of Dr Mason's gloved hands caress his ass. Dr Mason pushed the object deep into Frank, and left it there. He wandered into Frank's line of sight, and smiled at the discomfort he could see on Frank's face. Dr Mason reached down to jerk Frank's cock as he spoke.
"Don't worry, Frankie", he said. "It doesn't hurt that much."
Frank ground his teeth, but what the doctor said was right. The pain in his ass was lessening, becoming a dull ache that soon became a slight discomfort.
"See, Frankie?" Dr Mason said. "It's not so bad."
"Stop calling me 'Frankie'", he complained petulantly.
"What's wrong with 'Frankie'?" Dr Mason asked, his voice low and monotonous.
Frank opened his mouth to reply angrily, but found that he didn't have anything to say. He closed his mouth again, confused now.
"That's right, Frankie", Dr Mason said, picking up on Frank's hesitation. "I understand that you just want to let go, after being Praetor."
"No...", Frank said desperately. "I just had a broken arm..."
"A broken arm, and a desire to let me take control", Dr Mason said smoothly. "In fact, having me in control will make you very horny."
The doctor looked carefully at Frank. The son of Mars looked around the room desperately, but finally focused on Dr Mason. He was sweating profusely, and his breaths became shallower.
"Unfortunately", Dr Mason continued quickly, "you will only be able to cum if you ask me to let you. Otherwise, you won't be able to cum."
Frank flushed. Having to ask the doctor for permission to cum was too humiliating, as Dr Mason knew it would be. Frank struggled weakly, but couldn't move far. Dr Mason continued to jerk Frank off. He reached behind the demigod, and gripped the object in Frank's ass, pushing it deeper. Frank let out an involuntary moan as the object pressed against his prostate. His cock jumped in Dr Mason's hand, but Frank still couldn't cum.
Frank lasted a good twenty minutes. The whole time, Dr Mason continued to fuck his ass with the object, and stroke his cock. Frank felt like he was on the verge of cunning the whole time. Finally, he broke.
"Please, let me cum", he pleaded. "Please!"
Dr Mason smiled obligingly. Casually, he released Frank's cock, and removed the object from the demigod's ass. Then he lifted his asklepian from the table, and tapped Frank lightly on the forehead.
"You may cum", he said simply.
Immediately, Frank's cock twitched. Without anyone touching it, Frank began to cum, spewing jet after jet of his seed onto the ground. When he had finished, Frank's head felt light. He slumped, with only the alloy bonds holding him up. Dr Mason tapped him once again with his staff.
Frank opened his eyes. He was sitting on the chair opposite Dr Mason's desk, fully clothed. The doctor had just finished typing on his laptop.
"How was that?" Dr Mason asked. "Not too bad?"
Frank frowned. His mind was filled with himself being tied up as Dr Mason had his way with him. Frank's frown deepened. That made no sense.
"It wasn't bad", he said slowly. "Though I still don't see the point of this."
"As I said at the start, this is just a formality", the doctor replied. "But it's over now. You can return to Camp Jupiter. Send my regards to Reyna."
Frank gratefully got to his feet and left the room. Dr Mason glanced down again at his laptop screen. Frank looked up at him from the image, his eyes glazed, with golden ropes tying his naked body down.