The Monster in Her Head
After the first lecture ended, she called me to her private office. I packed my bag and stepped into the room. I never thought she’d summon me first.
“How was today? Did you enjoy yourself?”
“....”
She didn’t answer my question. Instead, the professor locked the door with a crisp click. Then she strode straight up to me and tossed the rotor onto the desk like a challenge.
“Is this fun for you? Does it amuse you to play with people like this? Think about it carefully.”
“...”
Her eyes held a storm of rage and sorrow as she pleaded with me.
“There’s a monster inside my head. If it eats me, what happens to me? It’s the same as dying. You’re killing a person.”
The voice that had been spitting fury only moments ago now carried a faint tremor, but it wasn’t born from anger.
“...Have you even considered the people around you?”
The tremor in her voice was sympathy, and the sorrow that bloomed from it.
“Professor.”
“....”
“Even if you disappear, no one will ever know.”
“...What?”
I tossed my bag onto the sofa and closed the distance, resting my hand on her waist. She tried to twist away, but her frail resistance was useless.
“Even if you vanish, the other professor living in your head will simply take over every role. She’ll lecture to the students, eat meals, chat with her colleagues—your daily life will continue without a single change. The only difference is that it won’t be you anymore. And as long as no one finds out, there won’t be any consequences.”
My hand slid lower, fingers digging into the soft flesh of her ass.
“How… how can you…”
She seemed to want to ask how I could do something so vile, but she gave up on persuasion. Her lips pressed into a thin line and her head dropped.
“...Get out of my way.”
Her voice had lost all strength after vomiting up every last emotion. I released her from the edge of the cliff she was backed against and stepped back.
She tried to slip past me in silence and reach for the door. I stopped her.
“Professor. Here.”
I handed her the rotor from the desk along with a fresh one I pulled from my pocket.
“I’m done for today, so stop making that face and get some rest.”
Her expression was so raw it felt like today might have been the most despairing day of her entire life. I walked past her, opened the door first, and stepped into the hallway.
I wondered what she was thinking right now. As an educator, she had failed to fulfill her duty to teach her students and was instead being toyed with by one of them. Was the humiliation crushing her?
I was curious to see how the parasite I’d implanted in her would grow, but after seeing her state today, pushing her any further might make her shatter. So I left first.
No matter how strong or intelligent a person is, knowing there’s a brain-eating monster inside their skull that will kill them the moment they feel pleasure is unbearable. She couldn’t ask anyone for help. She was utterly isolated, slowly having her mind devoured. That kind of situation could destroy the very existence known as “her.”
If that happened, I had no idea what would become of the parasite in her head. I decided not to waste anything and instead drive her to the brink little by little.
“...So what now?”
There were no more lectures today, so I left campus and considered my next move. A jobless loner with no friends—what would someone like that do at this hour? Then another jobless loner came to mind.
I pulled out my phone and called her. Sure enough, she answered before the first ring even finished.
“What do you want at this time of day?”
It was Seo-hee, the only person who wasn’t a student and had no job.
“Let’s go on a date.”
“...You really have zero sense. Taking a girl somewhere like this.”
“Why? You girls like this stuff, don’t you?”
Seo-hee yanked her hat down low to hide her face. The place I’d brought her to was an adult toy shop. After meeting the others, this store had become one of my regular stops. There was a reason I’d brought someone else here today.
“When I come alone, the clerk always tries to talk to me. Even when I say I’m fine, they keep explaining, ‘This one is used like this~’ and it gets too friendly. It’s honestly burdensome.”
“...Ugh.”
“Besides, you don’t have anything better to do anyway.”
I was killing time in a place like this and felt embarrassed, so I kept making excuses. Seo-hee stared at me with eyes that said she saw right through it.
“I really don’t have anything to do, but if that’s the case, why don’t you just drop out?”
“Drop out…”
Of course I’d considered it. Before my life had been turned upside down like this, I’d felt like I had to do something, so I’d forced myself to keep going toward graduation…
“Maybe I should.”
“That’s for you to figure out.”
I decided to think about it later. As Seo-hee waved and tried to leave the store, I headed to the counter to follow her.
“...Is that your girlfriend?” the clerk whispered.
I made a mental note to never come back here again.
“Mmm…♡ So this is why you called me?”
“Well, it’s not like we have anything else to do.”
After leaving the adult shop, we grabbed a meal. Then I took her hand and headed straight for a motel.
The moment we entered the room, I kissed her and began peeling off her clothes one by one, as gently as plucking flower petals.
“...Instead of doing this, shouldn’t you be thinking about what you’re going to do from now on…”
“What are you talking about? You want it too.”
I lifted the hand that had been between her legs and spread my fingers, showing her the thick, sticky strands of arousal.
Seeing the evidence, Seo-hee couldn’t argue. She lowered her head in embarrassment.
“Don’t worry. I’ve been thinking about my future plans. That’s why I wanted to run an experiment on you today.”
“What?”
She looked up in surprise. I pressed my index finger—now sprouting tiny thorns—against her forehead.
“...Uwah… What is this? It feels kind of weird…”
“Hmm…”
It seemed the hypnotic effect still worked on ordinary people whose flower petals hadn’t fully taken root, like the professor. But with Chae-yun or Seo-hee, hypnosis didn’t seem to take. Still, it didn’t matter. That wasn’t what I was testing today.
I’d used this power several times now and had started to understand its traits. Setting aside the professor, who already had a petal lodged in her brain, I had secretly used it on the restaurant clerk earlier while eating with Seo-hee.
The command had been Don’t charge us for the meal.
The clerk had refused.
I realized again that this ability wasn’t an absolute like Chae-yun’s brainwashing. So next I tried persuasion instead of a direct order. Rather than commanding them not to take payment, I explained why they should let me pay. I added a tiny lie—that I had already paid—and they let us go without any trouble.
This power didn’t control people. It deceived them. It made the impossible possible.
Like the placebo effect, where fake medicine improves a patient’s condition through psychology, it rendered the human brain vulnerable and slowly, artfully twisted their thoughts.
When you considered that the act of “deception” could influence every aspect of a human being, it was not an ability to underestimate.
So today, I would use it to deceive Seo-hee’s body.
Her specialty was the poison her body produced. Couldn’t we make use of that?
The lethal, burning liquid that flows through your veins.
What could it be?
“What are you doing right now… eh…?♡”
The moment it began, her face flushed crimson. Her eyes grew hazy like someone drunk. She couldn’t hold herself upright and collapsed to the floor, looking up at me in utter confusion.
“Why… why is my body so hot…♡”
She panted heavily, drool slipping from her lips. I knew the experiment had succeeded.
You can create poison. Make it now.
But what you’re making now isn’t meant to harm people. It’s to make them happy. So what do you need to create for that?
“It’s an aphrodisiac.”
“....Aha… haa….♡”
I tried to explain, but the high-potency aphrodisiac—strong enough to intoxicate a being who had already transcended humanity—was burning through her brain, clouding her thoughts. She couldn’t properly hear me.
“...Ah… aaaaaah…!!♡♡”
Reason had already left her. She began frantically rubbing her pussy with her own hand. There wasn’t a trace of intelligence left in her eyes.
Completely unconcerned with how she looked, she lay on the floor and chased pleasure with mindless desperation.
The effect was almost too strong. Before she dehydrated herself from all the squirting, I decided to join in.
I grabbed a fistful of her hair and pulled her up.
“Agh…?!♡”
“Who said you could enjoy it by yourself?”
Stroking her masochistic side, I pulled down my pants and brought my cock right in front of her face.
“Haa… haa… cock…♡”
The second she tried to take it into her mouth, I yanked her hair to stop her.
“...You were enjoying yourself alone earlier, weren’t you? If you like doing it by yourself so much, I’ll let you enjoy it with this.”
I threw her roughly onto the bed and opened the bag from earlier.
“Ah… aaa…♡”
Inside were all the various toys the overly talkative clerk had recommended.