Geonwoo continued to explore my body. Touching my chest, pinching my nipples, inserting his fingers into my vagina—Geonwoo kept teasing my body as he instructed me to focus on studying.

    Naturally, it was impossible to concentrate on studying while being caressed all over.

    “You made a mistake in this problem again.”

    “I did, really?”

    “Yeah. Then you’ll have to be punished, right?”

    However, every time I couldn’t concentrate, Geonwoo would give me a “punishment.” Despite feeling fear at the thought of receiving punishment, I quietly raised my buttocks.

    As I sat on Geonwoo’s knees and exposed my buttocks, he gently touched them and asked, “Seriously, even when the teacher takes time to teach you, you can’t focus?”

    “….”

    “Answer.”

    “S-Sorry…”

    Smack!

    “Ouch♥”

    “Sorry to the teacher?”

    “I-I’m sorry, Teach…er♥”

    Geonwoo suddenly demanded that I address him as “Teacher.” In a state where my body had become sensitive due to persistent caressing, I had no choice but to obediently endure the pleasurable pain each time my buttocks were hit.

    “Can’t even solve such a simple problem… Do you think you can get into a good university like this?”

    “I-If I don’t go to a good university…”

    Whack!

    “Eek♥”

    “Don’t give me a stupid answer. You should go to a good university that matches your potential, not end up being a loser breeding more losers.”

    “N-No… I’m a man…”

    “Don’t talk back!”

    Whack!

    “Eek♥”

    “Who said you could go back to being a man? You’re far from getting revenge.”

    Whack!

    “Ahh♥”

    “But I’m being kind. I’m doing this to help you live your messed up life properly.”

    Whack!

    “Hehe♥”

    “So, did you do something wrong? Or not? Answer.”

    “I-I did something w-wrong♥”

    Without knowing what I had done wrong, I confessed while continuously getting hit on my buttocks. Geonwoo would stop hitting me only when his hand started hurting more than mine.

    “I’ll stop here for today. But I’ll be back tomorrow.”

    “T-Tomorrow too…?”

    “Yeah. I need to teach a blockhead like you for a day to make any progress, right? I’ll be here tomorrow. No, until the mock exam in a month.”

    Continuing for a month. I swallowed hard at those words. Despite the fear of being humiliated at home for a month, there was also a sense of anticipation.

    Somehow… I wouldn’t study if left alone, but under Geonwoo’s humiliation, I found myself doing it. Although I was scolded for not concentrating, I was actually surprisingly focused by my standards.

    “If you can’t do it tomorrow, be prepared for punishment.”

    “Umm.”

    “Do you have something to say?”

    “Is there… a reward?”

    “What?”

    I subtly asked Geonwoo if there was a reward besides punishment. I’m not sure why I asked that now, and it’s a bit embarrassing, but at that moment, I felt a bit crazy.

    But Geonwoo seemed to seriously consider the idea of a reward.

    “Just the fact that I’m teaching you is a reward… But having a reward might give you motivation for improvement. So, what kind of reward do you want? Except for asking to be turned back into a man, I’ll consider everything else.”

    “T-Then…”

    “Then?”

    “Be kind to me.”

    I muttered as I fidgeted with my fingers. Perhaps it was because my submissive nature was growing rapidly. I longed for Geonwoo’s kindness. Whether it was stroking my head or giving me gentle kisses… I felt so good whenever Geonwoo showed kindness.

    Even if thoughts like ‘This isn’t manly…’ crossed my mind briefly, I quickly dismissed them when I felt good and delved into thoughts like ‘Am I really a man?’

    “W-Well, it’s not a difficult request.”

    “Mmm… Chu…”

    Geonwoo kissed me right then and there. The subsequent teasing with his tongue and the comforting touch felt even kinder than before.

    The awkwardness of the day I was first insulted had completely disappeared. My attitude towards accepting Geonwoo’s insults had changed drastically as well.

    Far from refusing… my body was actually craving more torment. While my mind still had resistance, my body was completely submissive.

    “Done?”

    “Huh, hoo…”

    “If you do well starting tomorrow, I’ll give you a kiss as a reward.”

    Despite not wanting to, my heart raced at the mention of a kiss as a reward. At the same time, a kiss alone was not enough. However, Geonwoo never mentioned anything beyond that. Why… when he probably wanted it too.

    Could he be deliberately doing this to tease me? The thought crossed my mind. And that thought turned out to be true.

    “Oh, you’re here again today. Please take care of our Sihyeon.”

    “Don’t worry. Sihyeon is working hard too.”

    Geonwoo came every day, without fail, for a month. In front of my mom, he acted like a model student, while in my room, he insulted me and made me study.

    “Well done. Now open your mouth.”

    “Mm-hmm…”

    “Should I touch your chest too?”

    “Yes…”

    While I studied under Geonwoo’s rewards and punishments, he never engaged in sex. He even prohibited masturbation. He made it so that ‘climax’ could only be achieved through rewards.

    As time passed, I felt a burning desire in my body. To relieve it, I had to focus more on studying. And as I focused on studying, Geonwoo’s insults became more persistent, reigniting the burning desire.

    And so… a month passed.

    “Average score of 60… Although your math score is dismal, considering it was rock bottom, you’ve improved a lot. Well done. Your parents seem really pleased.”

    Studying in a vicious cycle, my grades improved significantly. Compared to two years ago when I had to retake due to my abysmal performance, the improvement was remarkable.

    Having achieved such grades, my mother even shed tears. My father looked at Geonwoo with a somewhat awkward expression.

    “You got decent scores… so I should give you a reward…”

    But it was Geonwoo who, upon entering the room, spoke with a glint in his eyes. Luckily, my parents were out, leaving just Geonwoo and me at home. We usually kept the door closed, but now, more daring actions were possible.

    So, I didn’t know what would happen. And I was eagerly anticipating it.

    “Hey. Bring out that outfit.”

    “That outfit…?”

    “The school uniform you used to wear.”

    “Why?”

    “Why? Just do it.”

    I was momentarily taken aback by Geonwoo’s sudden request for the school uniform, but I quickly rummaged through my closet and pulled it out. In fact, since becoming a girl, I had never taken it out. It used to be a boy’s uniform.

    However, the uniform I found in the closet was a complete girl’s uniform. Moreover, it was a slightly smaller size that now snugly fit around the chest area.

    “Put it on.”

    “H-Here?”

    “Yes. Oh, and take off the bra.”

    “….”

    While inwardly cursing him as a pervert, I reluctantly undressed and put on the uniform. As expected, the tight chest area revealed a lot around the waist. Even without wearing a bra, it was not only big but also did not sag at all.

    “Damn, the red one is insane.”

    “D-Don’t use vulgar language.”

    “You used to talk like that all the time at school, right? Be quiet and sit here.”

    As Geonwoo sat on the bed, he pointed between his legs. When I sat there, he immediately grabbed my chest roughly.

    “Ah♥”

    “I should give you a reward, right? Open your mouth.”

    “Hoo…”

    Geonwoo, not bothered by the lack of a bra, started kissing while caressing my chest over the clothing. His movements were rough, but his technique felt gentle and kind. Lost in Geonwoo’s kisses and caresses, I suddenly felt him pressing against my buttocks between his legs.

    “Hey, suck now. This time, I’ll give you a reward with your mouth.”

    Geonwoo issued the following command. I nodded and brought my face closer to Geonwoo’s thigh. Then I unzipped Geonwoo’s pants with my mouth.

    As a result, a fully erect penis popped out through the zipper of the pants. It was so big and thick that it almost touched the tip of my nose.

    For a moment, I wondered why someone with such a penis couldn’t act more manly at school… The thought of this penis violating my body over and over again felt strangely fascinating.

    “What are you waiting for, not going to suck it?”

    Lost in such thoughts for a moment, Geonwoo nudged my vagina with his toe while saying those words. As if being whipped, I immediately started sucking Geonwoo’s penis.

    “Aren’t you amused? People around remember you as a girl. What would they have thought seeing a girl like you, with a big mouth and a pretty face, bullying high school losers?”

    Geonwoo began to taunt me as I started fellatio. While his hands were leisurely placed, he continued to mock my vagina with one foot. I was barely holding back my climax, but my panties were already damp.

    “When you were a guy, people probably thought you were a jerk or a loser, but when you became a girl, you must have looked like a crazy bitch playing with top-notch guys.”

    Churp-churp-

    “Huh? Isn’t that right? What do you think those guys would say when they see you sucking my cock?”

    Churrrrrrp-!

    Excited by Geonwoo’s actions, I sucked his penis even more eagerly. I was excited not only by the situation but also by the prospect of receiving punishment.

    “You’re really good at sucking. Hey, swallow it. Take it in your mouth.”

    Sllluuurp-

    Geonwoo held my head in place and ejaculated into my mouth. Following his instructions, I neither swallowed nor spat out the semen, keeping it in my mouth.

    Then, I opened my mouth wide to show the cum inside. I was accustomed to such commands after hearing them several times before.

    “Swallow.”

    Geonwoo usually commanded me to swallow, so I obediently gulped it down. After swallowing, without being told by Geonwoo, I continued to clean his still erect penis as if searching for something.

    The bitter and sticky smell of the semen made my brain numb. Apart from wanting to feel better, nothing else crossed my mind. I wanted more punishment, or rather, more rewards.

    “Do you want more?”

    “…Yes.”

    “Then lie on the bed with your buttocks up.”

    Following Geonwoo’s command, I lay on the bed like a dog. I asked if I should undress, but he told me to stay dressed, except for taking off my panties.

    “I’ll have sex with you as the final reward. Beg me if you want it.”

    Geonwoo told me to beg myself. Normally, I would have resisted, but after a month of teasing, I craved sex.

    “Please… have sex with me…”

    Smack!

    “Eek♥”

    “Is that all? You’re really slow at learning. Beg properly.”

    Another smack from Geonwoo. I enjoyed the strange feeling and began to beg more intensely and vulgarly.

    “Oh yes♥ Without a teacher, this idiot who can’t study or have proper sex, please give me your teacher’s penis quickly♥”

    “Well done.”

    “Ah♥”

    Satisfied with my response, Geonwoo inserted his penis.

    “Receiving rewards is the best…♥”

    For me at that time, having sex after a month was the ultimate reward.

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