Jinwoo threw a punch at Daeho's face.
As Daeho was running, he got hit by Jinwoo's fist and fell flat on the ground like a piece of paper.
"You crazy fucker, how could you do that to our noona, of all people!?"
Jinwoo yelled at Daeho, not caring about his surroundings, his eyes flipped in rage.
"Ah!! Time!! Time!!"
Daeho, lying face down on the ground, clutched his face and screamed.
"Were you trying to make her like your mom?"
Jinwoo was about to throw another punch at Daeho, who he had grabbed by the scruff of the neck.
"Fucking calm down!! It's not like that!!"
Daeho managed to grab Jinwoo's arm and pleaded.
Jinwoo was angrier than just for Daeho following his sister around and taking photos.
It was a problem because it was Daeho.
Jinwoo knew how Daeho treated his own mother.
"Stop overreacting! How the hell am I supposed to turn Sohee into someone like our mom? Am I a magician or what?"
Daeho desperately tried to defend himself, making Jinwoo hesitate for a moment.
Daeho, still hissing with anger, took Jinwoo into a secluded alley in a residential area.
"Shit, my cheek is all swollen!!"
'Tch!!'
Daeho chewed something in his mouth and then spit out two white fragments along with blood.
His molar was broken.
Seeing the broken molar, Jinwoo also seemed concerned and asked Daeho.
"You okay?"
"How can I be okay after you hit me out of nowhere?"
Daeho retorted angrily.
"Shouldn't you go to the hospital?"
Jinwoo felt really sorry for what he had said.
"What's the point of going to the hospital for something like this!"
Daeho was pretending to be tough.
Jinwoo watched Daeho for a moment and then spoke.
"It was you in the early morning, right? Why were you following our sister? What about those photos? Were you targeting our sister?"
Jinwoo bombarded Daeho with questions to make his stance clear.
"Targeting? You crazy fuck, aren't you curious who your sister might end up fucking soullessly with some assholes?
Daeho, far from apologetic, was boldly defiant.
"What the hell are you talking about?"
"You're the one who told me, 0135!!!"
Daeho had overheard that Sohee and another girl, Sinbi, were considering a sex diet and had decided to follow them secretly starting the next day.
If sex was intense enough to be considered a diet, it would involve multiple partners or someone known for their stamina, Daeho thought.
Such partners would probably not be in a normal relationship, he thought.
That would mean group sex or swinging, and there would definitely be someone leading it, Daeho believed.
Daeho had been secretly following Sohee to find out about this.
"Why did you take the photos?"
"That's my hobby!!!"
Daeho's response cleared any remaining doubts.
However, a bitter feeling remained.
Jinwoo had not really thought deeply about such matters involving his sister Sohee.
But he vaguely knew.
His sister would soon experience a moral downfall.
This downfall wouldn't be as trivial as getting a tattoo, wearing sexy clothes, or smoking, and it would pass by Jinwoo without any connection, unnoticed.
Jinwoo felt a sticky, unpleasant heat melting inside him, causing a stifling sensation.
* * *
With a bitter emotion, Jinwoo headed silently to school.
Suddenly, the notification sound of a message rang from his smartphone.
The sender was Daeho, who was walking right beside him.
"What is it?"
Jinwoo asked nonchalantly as he unlocked his smartphone.
"I didn't tell you, but I'm sorry, so here are a few photos of Sohee from yesterday and today and a last surprise... don't be too shocked."
When Jinwoo checked the message, there were several photos of Sohee taken yesterday and today.
Her beautiful face, full breasts, and well-shaped body contours were mesmerizingly depicted on the screen.
As Jinwoo scrolled through the photos, immersed in a blissful mood, the last few photos made him gasp.
They were of Aunty Gyuri,
'A Slave Contract'
Behind the contract were several photos of Aunty Gyuri's face.
Each one blatantly showed her mouth filled with semen.
The shocking photos made Jinwoo's heart pound.
He looked at Daeho with a startled expression.
Daeho also looked back at Jinwoo with a satisfied smile on his bruised face.
"Are you finally doing this kind of stuff with your mom?"
Jinwoo asked Daeho, feeling a slight thrill.
"No, no, it's not me!! Look, how old does mom look?"
Daeho spread his palm and gestured as he spoke to Jinwoo.
Jinwoo checked the photos.
Aunty Gyuri's face indeed looked different in each photo, appearing younger in some than in others.
As he flipped from the most recent photos to older ones, it seemed like he was traveling back in time.
And the youngest-looking photo of Aunty Gyuri almost made her look like a teenage girl.
Jinwoo continued to scrutinize the front of the slave contract.
The title at the top of the first page read 'Slave Contract', and the first line stated: 'Kim Gyu-hyoung owns Park Gyuri as his slave.'
Kim Gyu-hyoung was Daeho's father, and Park Gyuri was the very Aunty Gyuri mentioned.
The contract was filled with numerous clauses about the master-slave relationship, and the last page included both their signatures and a date that was from over 20 years ago, before Daeho was even born.
Daeho continued talking as he proudly laid out his findings like trophies, explaining more than what was asked.
"If you look at the back, there are records of long-term leases, too. Looks like it happened about six times, and the photos of mom's face seem to be what they took in place of stamping documents during those rental agreements."
Jinwoo was too shocked to respond to Daeho's revelations.
"And the back page has the renters' names and personal details. Guess what I saw there?"
Daeho grinned mischievously as he continued.
Jinwoo flipped to the back page.
Under the heading 'Slave Rental Agreement,' it listed the renters' names, personal details, and rental periods, among which the name 'Yoo Jinseong' appeared twice.
That was Jinwoo's father.
* * *
Jinwoo remained confused even after arriving at school.
The excitement didn't subside.
Jinwoo knew Aunty Gyuri had been a sexual slave rented out here and there, and his father had used her services not just once but twice.
The lease periods were certainly not short.
Probably, among the photos were two showing Aunty Gyuri with his father's semen.
Though it might be considered infidelity, Jinwoo was more shocked that such a contract had been established and maintained.
A troubling question arose in Jinwoo's mind.
His mother and Aunt Haeju had been close friends with Aunty Gyuri since childhood; could they really be unaware of these situations?
If Daeho hadn't told him, Jinwoo would have also overlooked Aunty Gyuri's circumstances.
Jinwoo quickly came to terms with this.
And he thought of his mother.
The idea of his mother entering into a slave contract with him sent shivers down his spine.
However, even if Jinwoo showed her the contract now, he didn't feel like his mother would agree.
At present, his mother was sharing intimate moments with Jinwoo secretly from the family.
But that didn't mean she would consider a master-slave relationship with Jinwoo as something special.
Maybe his mother was just indulging Jinwoo's desires like she would Minji's childish whims.
Jinwoo wanted to find out how far his mother would accept him...
As he was contemplating, Seul-gi approached him and started a conversation.
"What are you brooding over?"
Seul-gi was Sinbi's younger sister.
Creating quizzes and puzzles that are too explicit to mention or reenacting the sound of a woman moaning with the creaking of chairs, Seul-gi competed in wit with Daeho without being overshadowed.
In school, she was known as the "beauty pervert" and was quite active.
"Are you and Daeho fighting?"
Holding a bag of Injeolmi snacks labeled 'Sweet Bean Powder,' Seul-gi asked Jinwoo, making sure the bag was visible.
"Not really fighting, just a bit of bickering."
Jinwoo vaguely responded.
"Don't be too hard on Daeho, he's pitiful, you know," Seul-gi said in a melodramatic tone.
"Ah, it's not like that," Jinwoo replied, feeling somewhat oppressed as if he were the perpetrator of an ambiguous incident.
That feeling of oppression suddenly reminded Jinwoo of a conversation he had with Sohee about tattoos that morning.
Sohee had definitely said she didn't have a boyfriend.
Then what about Sinbi, who had gotten a couple's discount with someone?
Jinwoo hesitated whether to ask Seul-gi if she knew anything.
As Jinwoo hesitated, Seul-gi spoke.
"Whatever you're worried about, it'll definitely be alright."
Seul-gi smiled at him with a comforting and radiant smile like a saint's breath