Recognition Alteration - Professor Kim's Second Guest Reception (1)

The doorbell rang clearly, echoing all the way into the bedroom. Beyond the front door came Cha Eunyung's voice.

Cha Eunyung. The beautiful mixed-heritage student. Her skin was porcelain white, her features slightly Western, and her eyes a striking, vivid blue. Those eyes could steal a person's soul in an instant. If you happened to glance away from the lecture and caught sight of that blue, you would freeze, staring helplessly into them. It was like light refracting through a flawless sapphire. Her figure was slender and elegant, her ankles delicate and pale beneath the hem of her skirt. Cha Eunyung was beautiful enough to work as a model. She had even appeared on the cover of University Today magazine, so quite a few people knew her face.

And I had once had anal sex with her. The memory was still vivid. Every time I thrust, her white ankles trembled. My cock sliding in and out of her ass. Semen running down her pale, beautiful thighs. The tiny bell on her bracelet ringing without pause.

Ding-dong~

Right now, that ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠same Cha Eunyung was pressing the doorbell of Family Life Building B, Room 201, where I was staying. Why had she come? There could only be one reason. Professor Kim Byung-yoon had called her here. He had also summoned her older sister, Cha Eunju, over the weekend. And now he had invited the younger sister, Cha Eunyung, at a slightly different time. I could guess what the professor was thinking.

Cha Eunju with her full breasts and voluptuous body. Cha Eunyung with her slim, beautiful lines. There was only one reason to call both sisters to the same place: to have sex with them together. To tangle the three of them up in one bed. That was all.

'Professor, you really are greedy.'

I had thought the same thing when I first learned Professor Kim Byung-yoon had tried to use grades to get anal sex from Cha Eunyung. The same thought had crossed my mind when he used the video of that act to blackmail Cha Eunju into bed. But now I realized his greed had no limits. Or perhaps this had been his goal from the very beginning.

'He said he contacted both sisters right after Cha Eunyung's entrance interview...'

Professor Kim Byung-yoon must have first seen the sisters when he interviewed university applicants. Cha Eunyung would have been a high-school senior, wearing her school uniform for the interview. She would have looked beautiful even then. Those blue eyes. The pale legs beneath her uniform skirt. And Cha Eunju, who had come with her—large breasts, narrow waist, full hips and thighs. On the day of the interviews, Professor Kim Byung-yoon had clearly spotted the sisters and set his sights on them. Perhaps, from the very first moment he saw them, he had imagined the three of them tangled together, exploring one another's bodies. That was why he had kept contacting the sisters even after the interviews ended. After all this time, his fantasy was finally about to come true—except I was the one living it instead.

A quest window appeared before my eyes. I had been regretting how short my time with Cha Eunju had been, but this quest would extend my time as Professor Kim Byung-yoon by another thirty minutes. Smiling at the pleasant thought, I quickly got dressed. I wiped my still-wet cock on the edge of the blanket covering Cha Eunju's upper body, then pulled on underwear and sweatpants. Since I had come wearing light clothes today, it did not take long to get dressed.

'Huh?'

While I was getting dressed, a familiar object caught my eye. The random box. I had tossed it aside earlier during the intense moment with Cha Eunju. I picked up the plastic box.

Ding-dong~

"Professor, are you not home~?"

The familiar texture of the plastic box in my hand. Cha Eunyung's beautiful voice at my ear. Maybe something useful would come out for the time ahead. I opened the plastic box right there. The seams split and it cracked open lightly.

Crack.

What came out of the plastic box was a clicker. The kind used to train dogs. All it did was make a "click" sound when you pressed the button. It looked a bit like a car key fob. I had seen clickers on TV before. Dog trainers used them to mark good behavior with a click, followed by a treat. Just like Pavlov's dogs salivating at the sound of a bell, the click became a signal that told the dog which action was correct.

A dog-training clicker. That was what the random box had given me. I slowly read the item description.

'If I hold it to someone's ear and click, it deletes one hour of their memory?'

A strange item. Something that erased a person's memories. I could not immediately think of a good way to use it.

Just then—

Ding-dong~ Ding-dong~ Ding-dong~

Cha Eunyung rang the doorbell repeatedly, as if tired of waiting.

Swish.

"Professor, did someone... come? And—" Cha Eunju's voice came from under the blanket as she tried to lift it slightly. She probably could not hear the doorbell or Cha Eunyung's voice clearly from beneath the covers. I quickly stopped her hand and pulled the blanket back down. She still had only her pale waist and legs exposed from under the blanket.

'Just wait a little. I'll play with your little sister soon enough.'

The recognition alteration was still active. I did not speak, worried that if she heard my voice she might realize I was not Professor Kim Byung-yoon. Leaving Cha Eunju like that, I headed for the front door to let Cha Eunyung in. The door had been closed. It had been open when we arrived, but Cha Eunju must have closed it after coming inside. Only now did I remember watching her back as she locked it.

Ding-dong~

I opened the door and greeted Cha Eunyung.

Click.

Cha Eunyung appeared in the doorway. She looked beautiful today as well. She wore a long, pleated mint-green skirt that reached her ankles, with light-blue flat shoes peeking out beneath. On top she wore a white puff-sleeve blouse, the gentle swell hinting at the size of her breasts. Her outfit was entirely in pastel tones. She carried a handbag in one hand, and on her other wrist... she still wore the bracelet her boyfriend had given her. Thin gold hoop earrings hung from her ears.

'Whew... she's really pretty...'

Seeing her up close after so long, I felt my soul being pulled out by her beauty. The contrast of her snow-white skin and jet-black hair reaching her shoulders, those sapphire-blue eyes, the pale, slender ankles beneath the long skirt. She was a girl who literally possessed beautiful colors. Her skin tone was the same as Cha Eunju's, that pure white reminiscent of soft tofu.

"Professor."

Cha Eunyung addressed me as "Professor." Thanks to the quest, she now perceived me as Professor Kim Byung-yoon. Appearance, voice, clothes—everything. I answered as much like the professor as possible.

"Ahem. Student Eunyung. Come in."

"No, thank you. I'm fine."

'...Huh?'

Contrary to my expectations, Cha Eunyung did not step inside. Her expression was firm.

'Then why did she come?'

If she had no intention of entering, I could not understand why she had come here at all. As if answering my confusion, Cha Eunyung spoke first.

"Professor, I came here today exactly as you instructed, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠but only to make one thing perfectly clear."

She stood outside the door, not taking a single step inside. It seemed she had never planned to enter in the first place. With a resolute expression, she continued.

"Professor, there will be no more entanglements between you and me from now on. I told you this over the phone several times, but you kept ignoring me, so I came in person. I'm not interested in scholarships or degrees, so please stop contacting me. It's unpleasant."

From her words, it seemed Professor Kim Byung-yoon had been persistently pursuing Cha Eunyung, using scholarships and doctoral degrees as bait. Apparently one round of anal sex had not been enough for him.

'That aside... does Professor Kim Byung-yoon actually believe he had anal sex with Cha Eunyung?'

It seemed so. The video he had used to blackmail Cha Eunju—the one of Cha Eunyung and me having anal sex—had my face edited out as if it were his own. Professor Kim Byung-yoon's memories appeared to be distorted. Thanks to the professor, I was still enjoying myself, but...

'How do I convince her...'

Cha Eunyung looked ready to leave after finishing what she had to say. I had to stop her before she walked away. What would be the best way? Then an easy method occurred to me.

Cha Eunyung was about to turn her back and walk away, but my next words made her freeze in place.

"Before you go, why don't you at least see your sister's face?"

"....What?"

"Since you're already here, take a look at Cha Eunju's face before you leave."

Cha Eunyung turned around with an expression that clearly said, 'What the hell is this man talking about?' She soon spoke with visible irritation.

"What are you saying? Why would my sister suddenly be here? Stop talking nonsense, Professor."

Mentioning her sister had clearly caught her attention. The fact that she had stopped and turned around meant she was already halfway hooked. I smiled slyly and continued.

"I called her. I secretly filmed a video of you having anal sex. When I used it to blackmail her, she came right over."

"D-don't talk crazy."

Cha Eunyung's eyes began to tremble. Even as she denied my words, she could not hide the anxiety in her ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠gaze.

"Or... why don't you call your sister and check for yourself?"

"..."

Cha Eunyung glared at me as if she wanted to kill me. Then she opened her handbag, took out her phone, and dialed Cha Eunju's number, just as I suggested. She wanted to confirm that my words were lies. She believed that the disgusting, lecherous professor would never have dared to touch her sister.

She called Cha Eunju.

Vrrrr~

Soon, the sound of a phone vibrating could be heard ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠clearly from the bedroom, whose door was wide open. Hearing that faint vibration, Cha Eunyung's eyes widened like a startled rabbit as she slowly stepped inside. She passed through the doorway, walked past me, and began moving toward the bedroom where the vibration was coming from.

I watched her retreating figure carefully. The long skirt that reached her ankles hid her lower body, but with every step she took toward the bedroom, the fabric swayed and gave fleeting glimpses of the shape of her legs and hips.

Vrrrr~

Though I could not see her face, it must have gone deathly pale. I followed behind her into the bedroom.

The sight that greeted us inside was obscene, absurd, and strange all at once. A woman lay with her upper body completely covered by the blanket, only her lower body exposed. Her pale, plump thighs were spread wide apart. Between them, white semen still trickled from the slit of her pussy.

Vrrrr~

In one corner of the room, a phone vibrated inside a handbag. But Cha Eunyung no longer followed the sound. Instead, she approached the bed where only Cha Eunju's lower body was visible.

"S-sister?"

Her hand trembled as she reached out to pull the blanket away and see the face beneath.

Swish.

And finally, Cha Eunyung lifted the blanket.