Petra Becomes Kostas' New Pet

It was a brand new day, and everyone at the monastery was appreciating how beautiful it was. In the courtyard, Petra was enjoying a nice, hot cup of tea with her professor.

“You have my thanks again for inviting me, Professor. I am grateful for your kindness.” Out of nowhere, Byleth had asked Petra if she could take her out for a cup of tea. Petra respected her professor, but she never got any one-on-one time with her. Therefore, Petra saw this as a way to get to know Byleth. Byleth, on the other hand, had plans for the future ruler of Brigid.

As a loyal **** to her Master, Byleth had been tasked with finding new potential slaves for Kostas. After that, it didn’t take long for Byleth to set her sights on Petra. Byleth loved the way the girl moved. The grace and ferocity with which Petra attacked her enemies were so alluring. On top of that, she was ridiculously in-shape, not to mention the adorable way she spoke. Byleth knew Kostas would have plenty of fun with the girl, and she couldn’t wait to offer her up on a silver platter, showing just how far the professor had fallen.

“You’re welcome, Petra. You’re lovely company. I’m glad we could have this time to just sit down and talk.” Byleth smiled, “Are you enjoying your tea?”

“Yes, I like it much,” Petra answered. “I am not knowing of this flavor. Is this popular in Fodlan?”

“You could say that,” Byleth took another sip, closing her eyes as she took a long whiff of her tea. “It’s one of my favorites.”

Petra finished her tea and placed her cup on the table, “I much enjoyed the tea and conversation, Professor. I will be waiting happily for you to be inviting me again.”

“Of course, I’m sure we will get together again very soon. Actually, before you leave, could you go to the classroom and grab my lesson plan? I forgot to grab it before coming here. You would be helping me a lot,” Byleth asked.

“That is no problem, Professor. It gives me happiness to help,” Petra answered. “I will be seeing you soon.” Petra stood up and bowed her head before walking away.

Byleth rested her hand on her chin, grinning with glee, “Yes, you will.”

___________________________________________________________________________

Petra entered the classroom and walked over to Byleth’s desk. She looked around the desk, but there was no lesson plan in sight. It should be here.

All of a sudden, Petra heard the door close. She looked behind her and saw a man standing at the end of the room.

“Hello? Who are you?” Petra asked.

“Hey there, I’m a member of the Knights of Seiros and a good friend of your professor.”

“The professor?” Petra was hesitant of this man at first, but if he knew the professor, he probably didn’t mean her any harm.

“Yes, she’s why I’m here actually. She thought you might need some help.”

“Oh, well, the professor asked me to find her lesson plan, but I cannot seem to find it.”

“I can help you with that. It must be around here somewhere.”

“You have my thanks, Mr…..”

“Excuse me, milady,” Kostas said, “I forgot to properly introduce myself. My name is Kostas, and you are?”

“My name is Petra, it is nice to meet you.”

“Likewise,” Kostas then took off his shirt, shocking Petra.

“Excuse me, what is it you are doing?” Petra asked.

Kostas had a puzzled look on his face, “What do you mean? I’m offering you my nipples. It’s our tradition.”

“Tradition? I am not sure what you are meaning. I am from Brigid. I have no knowledge of such things.”

“Please, forgive me. This must be coming off the wrong way. In Fodlan, it is tradition for a woman to suck on a man’s nipples as a greeting.”

“Are you sure?” Petra asked, “I was not told about this when joining the monastery.”

“Well, you’re not supposed to when it comes to your classmates. But when you introduce yourself to a man, especially a knight, it is customary to do this.”

Petra wasn’t completely sure about this, but she didn’t feel like he was lying. It went against her better judgment, but some part of Petra was telling her that it was okay to trust him. Thus, Petra walked to Kostas and tentatively sucked Kostas’ left nipple.

“Like this?” Petra asked.

“Not bad, but you’re supposed to be a bit rougher and use your tongue more, and don’t forget to suck on both.”

Petra proceeded to suck harder, running her tongue in circles across Kostas’s nipple. Petra worked from one nipple to the other and back again. Without knowing it, Petra had repeated this process for several minutes.

“Very good,” Kostas said, “Now for the next part.”

Petra stopped and stood up straight, “Next part?”

“Well now that you’ve finished sucking my nipples, you’re supposed to suck my cock,” Kostas said bluntly.

“I do not have understanding,” Petra said.

“It’s part of the tradition. It’s how you show trust between new friends, and we are friends, aren’t we?”

“I….suppose.”

“Good,” Kostas took off his pants revealing his cock. He grabbed Petra’s shoulders and pushed her down to her knees, “So how about we get started?”

Petra hesitated; she had never seen a penis before. All Petra ever thought about was fighting and serving her country as best she could. She prided herself on being a strong warrior, but she found herself nervous in this situation.

Even though it didn’t make any sense, Petra leaned forward and gave Kostas’s cock a lick. She followed that up with one lick after another, slowly giving in more and more. Petra always put her all into everything she did, and this was no different.

“That’s a good start, but don’t forget you have to put my cock in your mouth,” Kostas said.

Petra immediately made adjustments. She gave a long lick from the base of his cock to the tip and then took his cock into her mouth. Petra’s hesitation began to peel away, as she started sucking Kostas’s cock.

Kostas let out a satisfied groan, enjoying the feeling of Petra working on his cock. He grabbed her braid and guided her, pushing her deeper, “Yes, just like that.”

Petra didn’t mind; she knew that she had zero experience with this kind of thing, and if this was Fodlan tradition, she was happy that Kostas was willing to teach her. Yet, the more Petra sucked his cock, the less it became about learning. She felt an unfamiliar rush of excitement, which pushed her to go down on his cock deeper and deeper. Petra closed her eyes, as she fell into these feelings that grew stronger by the second.

Kostas pulled Petra’s braid back, forcing Petra off his cock. Petra snapped back to reality, and she was now aware of a wetness between her legs. Petra was confused by it along with these new feelings that were still building up inside her.

Petra looked up at Kostas, “How was I?”

“Good,” Kostas answered, “Very good, but now it is time for you to undress as well.”

“What? Why?”

“It’s another part of the tradition. Normally, you wouldn’t have to, but it is customary to do this to show respect for a knight.”

Petra stood up and took a few steps back, “I…I am not sure.” Petra began to doubt Kostas’s intentions. He said that he was a friend of the professor, but something didn’t feel right. Actually, this whole situation was strange. Petra started to think that maybe…

It’s okay, don’t worry. Take off your clothes.

Petra’s worries went away, as she began to undress. Kostas grinned while Petra took off her clothes. He wasn’t sure how much he would have to push her, but it looked like she was more susceptible to the crest than he would’ve thought. It didn’t matter, as long as he got what he wanted, and he WANTED her. Badly. Lately, Kostas hadn’t gotten the chance to play around with his food, but he knew that he could mold her into exactly what he wanted. That professor knew I needed this. Hehehe, she’s really become a fantastic slut.

Petra undid the last button on her blouse, leaving her only in her bra and panties. Petra blushed and shyly covered her breasts, unable to make eye contact with Kostas.

“Sorry, Petra,” Kostas said, “You need to take off everything. I don’t make the rules.”

Petra looked at Kostas and hesitated for a moment. Do it. Upon hearing those words, Petra took off her bra and panties, leaving her completely naked.

Hehe, stupid bitch. Kostas walked up to Petra and ran his fingers up the girl’s legs, resting his hands on her hips. “I like your body, Petra. You sure know how to keep in shape.”

“Th-thank you, Kostas. I have much gratitude for your words,” Petra replied nervously.

“Tradition says you have to call me Master.”

“Thank you, M…Master.” Petra’s body shuddered the moment that the word left her lips. For some reason, it felt good to say it.

“Yes, just like that. But now…” Kostas grinned, “it’s time for the best part!” Kostas pushed Petra against a desk and bent her over. For the first time, Kostas got a good look at her ass. “Goddamn! Your ass is incredible!” Kostas grabbed Petra’s ass, squeezing her tight, firm ass cheeks. Petra gasped, as she was not ready for this kind of treatment.

“Is this…also……tradition?” Petra struggled to speak, as Kostas was getting more and more aggressive with handling her ass.

“Huh? Oh, yes yes. Offering your ass to me……shows just how much you appreciate our service to the monastery. You DO appreciate our service, don’t you?”

“Y-yes, I am…very…appreciating.”

“Well, I’m glad. Hehehe because I NEED to fuck an ass this nice!” Kostas spanked Petra’s ass, which evoked a squeal from the girl’s lips. This pleased Kostas so he spanked her again and again.

The longer Kostas continued, the more Petra started to like it. Kostas liked it too, as the harder he spanked her, the louder Petra’s squeals were. Kostas was showcasing his power over the girl and something about it made her incredibly aroused. Soon, Petra’s squeals turned into moans. Each time Kostas spanked her, a wave of pleasure vibrated throughout her body. This was unlike anything Petra had ever known, and she was helpless before it.

Kostas stopped spanking her and said, “All right, Petra. That’s it. We’re done.”

“We…We are?” Petra asked. Petra should’ve been relieved, but a part of her was…disappointed? It didn’t make rational sense, but she couldn’t deny it. Her body was in heat, and now, she wouldn’t have the means to release. She felt incomplete.

“Yep. That was the last part of the tradition,” Kostas answered. “I know it must’ve been strange for you, but I appreciate you bearing through it. But it’s over now. Unless…” Kostas grabbed his cock and moved it in circles around her asshole, teasing Petra, “You want me to keep going?”

Petra bit her lip; her ass twitched, as she was becoming overwhelmed by Kostas’s teasing. Petra was proud of her heritage, and everything she was taught told her that this wasn’t right. The truth, however, was that she didn’t care. She didn’t care about tradition, and she didn’t care about her heritage. She wanted to feel good. She craved the way that she was feeling right now, and she didn’t want to stop. All it took was a few simple words for Petra to betray her Brigid pride, “I am….wanting it.”

Kostas responded by finally infiltrating Petra’s ass, causing her to cry out. Petra’s eyes rolled in the back of her head, the pleasure overtaking her. Kostas fucked Petra’s ass roughly, delighted at the amount of control he had over her. He ran his hands along her back, appreciating her incredible physique. “Wow, I like you a lot. Your body is perfect for sex. I love it.”

Petra let out gasps of excitement, eagerly bouncing her ass in response to his thrusts. She arched her back while Kostas kept exploring her body, melting into his touch.

Kostas was very turned on; he knew that this girl was something special. He didn’t want Petra to be like the rest. He had different plans for her. Recently, Edelgard had become Byleth’s pet. He loved watching the professor exude her dominance over the girl, and he wanted the same thing.

“You’re my bitch now, Petra. You get what that means? You’re like a dog, a pet, and a good pet listens to her Master. You understand?!” He slapped her ass hard, making her yell out loud.

“Yes!” Petra exclaimed.

“Yes, what?!” Kostas slapped her ass even harder.

“Yes, Master!”

“That’s more like it! As my pet, you will do anything I command! You will receive pleasure every time you obey your Master. Every time you receive pleasure, you will love your Master even more. You will love being my pet.”

Petra moaned, as her mind accepted everything Kostas said. Kostas’s crest helped with this process, whittling down any of her leftover precious pride that would get in the way. Petra assimilated into her new role; her will and pride shattered more and more with each passing thrust. Once Kostas came in her, her role as his pet was cemented. Her body erupted in pleasure, crying out, “Yes, Masterrrrrr!!!”

An ornate heart formed just above her ass; Petra was happy to add another mark to her back. Every mark on her body had a significant meaning, and this mark displayed proof that she was owned by her Master. Kostas traced her new mark with his fingers, delighting in his handiwork.

Kostas pulled out of his new pet, allowing Petra to fall to the ground. The breakdown of her body and mind took a lot out of the girl. Petra wasn’t concerned about that, however. Petra never knew what she wanted for herself, merely adopting the wants of her tribe as her own. This conflict always existed within her, but now, she knew exactly what she wanted. She only wanted to serve him.

Kostas walked to his discarded pants and fished something out of his pockets. He walked over to Petra, who was still recovering on the ground. “Petra, get on your knees!” Kostas commanded.

Petra sat on her knees and looked up at Kostas in the same way a pet looked up at its humble master. From behind his back, Kostas revealed a collar with a leash attached to it. “When I put this on you, your old life will be gone. Obeying me will be your only role in life. You are my bitch. You are my pet. You will do anything for your Master. Nothing else matters.”

Petra closed her eyes and moaned at the thought. She knew he was right. Obeying her master was all that mattered. Petra opened her eyes and looked up again at Kostas, biting her lip. She couldn’t wait for him to put that collar on her. Petra moved her hair aside, as Kostas began to fasten the collar around her neck. Once it was fully fastened, the last pieces of Petra’s old self fell away.

“How does your new collar feel?” Kostas asked.

“Goooood,” Petra purred.

“I’m glad you like it, my pet. Show me your gratitude by cleaning my cock.”

Petra was happy to comply. She licked his dick clean, lapping up his remaining cum like a dog.

“If only your people could see you now,” Kostas caressed Petra’s cheek, delighted at his new pet. Petra nuzzled into Kostas’s hand, delighted at her new Master. Together, the two of them would have so much fun.

This tender moment was cut short, however, when the classroom door opened.

(Thank you for waiting so patiently. I finally got my computer back so I'm excited to continue writing.)