'S LINE'
(A red line connecting people who've had sex.)
So, sex...
No, that's not right.
A red line connects people who've had sex.
So, if you wear these glasses, you can see those red lines.
You've been able to see those red lines since birth.
Hey!
This is ridiculous.
You high schoolers,
I know you're fearless.
I'm a detective.
Don't underestimate a detective.
I knew you wouldn't believe me.
Wait a minute...
When did I say I don't believe you?
So, you're saying
someone took Seon-ah's glasses,
then called her to the rooftop and pushed her off?
I think so.
Who did it?
Why would they do that?
I don't know either.
I'm sure Seon-ah didn't commit suicide.
But it seems she threatened many people with her ability to see the S-lines.
Quite a few people must have been threatened by her.
Then...
Do you think there could be many pairs of glasses?
Because recently, several cases have occurred that are similar to the ones committed by the guy living upstairs from you.
Why am I telling you all this now?
Wait a minute.
So, the world you see is full of red lines, isn't it?
Yes.
Almost all red lines.
Oh... that's why you wear sunglasses.
You must... have a hard life too.
Seon-ah.
Kang Seon-ah.
What are you doing?
No sleeping in class.
Pay attention.
The human genome can be divided into autosomes and sex chromosomes.
There is only one pair of sex chromosomes.
The remaining 22 pairs are autosomes.
Autosomes are not related to sex inheritance.
Are you okay?
What's wrong?
It's nothing.
She was sleeping in class and woke up screaming.
Hey!
You're like that because your body is too weak.
Let's go out this weekend and get some fresh air.
I can't.
Why not?
If you don't want to go, just say so.
Because I have something to do.
What is it?
I'm going to work part-time.
Part-time? What kind of work are you doing?
Don't ask.
Maybe she doesn't want to say.
- Miseong Motel. - Miseong Motel?
Kim Mi-seong.
Yes.
I told you to redo it for me.
But you did it wrong again. What do you want?
You're really driving me crazy.
Go back and redo it for me.
I'm sorry.
Someone who hasn't even had sex is still there.
Mi-seong, where's your hometown?
Busan.
But you don't have any accent at all.
I put a lot of effort into correcting my accent.
Is it necessary to go to such lengths?
Because I want to be an actress. I'm preparing for it now.
You want to be an actress?
Yeah.
I was also scouted on the street once.
Is that so?
Do you know if the music teacher has a girlfriend?
What? Are you interested in him?
He's so handsome.
- Do you want me to ask him if he has a girlfriend? - Sure.
- Don't ask? - You should just eat your meal.
(Miseong Motel)
Hello, I'd like to rest.
It's 30,000 won in total.
Can't we stay in a hotel?
We're only staying for a bit, it's fine.
Thank you.
Last time you said we'd stay in a hotel.
Alright, I'll take you next time.
Kim Hye-yeong, who bullied Seon-ah.
Pushed her downstairs and then ran away.
How could she disappear without a trace?
She left no credit card or call records.
So, is it possible that...
After the Korean language teacher pushed Seon-ah downstairs,
she committed suicide out of guilt?
This is the most plausible theory so far.
Because the Korean teacher's last known location was at school.
However,
Until the Korean teacher's body is found, he's only considered missing.
And according to his family,
he has severe acrophobia.
So there's no way he would push someone off a tall building.
Although we can't fully accept that explanation,
Who is the killer?
Hyung.
What if Seon-ah...
She wouldn't kill herself.
I'm not trying to be stubborn,
but I just feel like something's off.
(Glasses?)
Seon-ah became a different person after putting on those glasses.
What kind of magic do those glasses have?
Let me tell you a secret.
If you put on a certain pair of glasses,
you'll know who you've had sex with.
Really?
Do you think that's true?
What are you doing?
Are you staying overnight?
Yes.
That'll be 60,000 won.
Ta-da!
What are you doing here?
Hey!
Our friend is working, of course we'd come visit.
You're underage, you can't be here!
Hey!
Aren't you underage too?
That's why...
This is illegal.
That's why!
Are there any guests now?
Can I go up and take a look?
- Hey! - Hey!
Hey!
Keep it down!
Hey!
It's so crowded!
It's so crowded in here!
Hey!
So why did you insist on coming in?
It's fun!
It feels... exciting.
I need to rest.
Room 206, please.
Is she alone?
(Miseong Motel, Room 206)
I think I've seen her somewhere before.
That's right.
I've been with many men.
But...
ever since you appeared,
just being with strangers
can no longer fill the emptiness in my heart.
I'm scared.
Scared that I'll never
have you.
I really want to have sex.
You're crazy.
You don't even have a boyfriend.
Not now, but I used to have many.
Those weren't boyfriends, that was stalking.
You've never been in love, yet you talk so much.
What's wrong?
Oh, right! That's it.
What?
The woman who just came in alone...
She's an employee from our school's administration office.
Do you remember her?
The one with glasses.
Are you sure it's her?
She looks completely different!
But nothing escapes my sharp eyes.
Could you keep your voice down?
(Hwajeong-dong Couple Murder Case)
Shin Hyeon-seop... When she was little,
her mom killed her dad and then ran away.
(Victim died on the spot) (Incident of victim being killed with a kitchen knife)
(Suspect is presumed to have learned of the victim's affair) (Learned of father's affair with suspect's sister, Yoo Jeong-hye) (5-year-old daughter Shin Hyeon-seop witnessed the scene)
(After witnessing, drew the affair scene with imaginary lines)
Am I being played by a psychopath?
(After witnessing, drew the affair scene with imaginary lines)
I have a few questions.
Seon-ah... does she...
have an S-line too?
That's personal privacy.
So she does, then.
Then Seon-ah's S-line...
is it connected to that student in your class named Ji-won?
Is it connected?
No.
I don't know who it's connected to,
but...
it's not someone in our class.
This is driving me crazy. Damn it.
You think the person connected to Seon-ah
is the one who pushed her?
Yes.
That's possible.
Last night, another random murder occurred in the Gangam-dong area. (Random murder occurred in Gangam-dong area)
Although the suspect was immediately arrested not far from the scene,
sadly, the victim died on the spot. (Arrested near the scene, victim deceased)
When the suspect was arrested at the scene,
even after committing the crime,
he kept saying, 'I'm clean now.' (Investigation expected to cover drug intoxication, cults, and other factors)
From his continuous hysterical laughter,
mental instability cannot be ruled out...
Is it possible there's more than one pair of glasses?
Glasses...
Are there several pairs?
(Music Classroom)
Excuse me.
The music was so beautiful,
I couldn't help but...
I really envy you.
You know so much good music.
What's the use of that?
I still deal with students at school every day.
You're Mi-seong, right?
- You remember me? - Yes.
What's your dream?
Guess.
I have a feeling you don't want to stay in school forever.
Do you want to be an actress?
Did I guess correctly?
Yes, how did you know?
I think you're very good at expressing things with your body.
You're right.
That's really amazing.
I'm really confident I can do well.
Those things are Motelate.
Right?
Are you going home?
Yes.
What about Kyeong-jin?
She said she had something to do at home today, so she left early.
Um...
Are you free?
I noticed you seem to like places where there aren't many people.
How did you know about this place?
I was on the swimming team until middle school.
Even though I don't train anymore,
I still sneak in for a swim sometimes.
Can you swim?
No.
Hey, are you okay?
What's this?
(Spicy Instant Noodles)
It's all cooked. Eat up.
It's delicious.
But are we allowed to eat here?
Yeah, as long as we don't get caught.
If Lee Kyung-jin were here,
she'd definitely say we should cook ramen with a portable stove.
But just now...
Why did you jump in?
You don't have to tell me if you don't want to.
Sorry.
I...
Ever since I was born,
I've been able to see strange things.
Everyone has red lines coming out of their heads.
Like this?
Yeah.
Do I have them too?
You don't.
Neither do I.
Kyung-jin doesn't either.
Do you believe what I'm saying?
Yeah.
Why?
Because there's no reason for you to lie.
I'm weird, right?
Yeah.
You're very extraordinary.
Just as I thought.
That's cool.
Someone like me is just too ordinary.
If I disappeared tomorrow, I don't think anyone would notice.
If you disappeared,
at least Kyung-jin and I would know.
That's true.
How many times do I have to say it?
- I told you it wasn't me. - Yes.
Do I look like a con artist?
Ms. Kang So-min.
Oh my god.
Ji-wook, long time no see.
Noona, long time no see.
Why aren't you answering my calls? I missed you.
Well...
No matter what, I can't take on criminals...
Wasn't the first time different?
Back then, they were just suspects.
Are you the type to pick and choose?
It's over, right?
Can I go now?
Okay.
Remember to answer my calls.
Hyung, when did you...
You don't need to know.
(Lee Ji-won)
(Kang Seon-ah's boyfriend?)
Hyung.
But don't you ever go on dates?
Am I dating anyone?
No, you're not dating anyone.
But aren't you always busy?
That's true.
Are you single right now?
I'm curious about someone.
But I don't want to sleep with her.
Seriously? Why not?
What do you mean, 'why'?
Can't I just be curious about someone?
I need to rest.
Room 206, please.
That's right.
I've slept with many men.
That's right.
I've slept with many men.
That's right.
I've slept with many men.
That's right.
I've slept with many men.
At first,
even just a room where I could lie down,
was enough for me.
I even thought, 'Maybe tomorrow I'll become a famous actress.'
But later...
My ears slowly started to hurt.
I didn't mind the sounds of others from next door.
The problem was my own voice.
I was afraid my movements,
and the sounds I made,
would be heard by others.
It was the same at school.
I was afraid someone would hear
the laughter I made when looking at the teacher.
Then I found this place.
An old motel that seemed empty in broad daylight.
In this room, I was free.
Then one day, I found a pair of glasses.
Through the glasses, I saw myself as perfect.
Then, at some point,
I became a spectator.
This room is perfect.
It's my perfect world.
You are here.
But why a motel all of a sudden?
I just remembered old times.
It's quite refreshing.
Don't you miss me?
I see you on TV, no need to.
Seriously.
Are you leaving?
How about the same time tomorrow?
(Yoon Jun-seon: Are you at Miseong Motel today too?) (Yes, I'm working.)
(Yoon Jun-seon: Can I come over?)
I'd like to extend my stay.
Which room?
Room 206.
How is it? Does it suit me?
- You're here. - Yes.
Teacher, you're early.
Miseong?
Teacher.
This music...
It's the one we listened to together back then, isn't it?
Why are you here?
Teacher, I...
have something to confess to you.
What?
Teacher, I...
have been with many men.
I've had relations.
What are you talking about?
That's right.
I've been with many men.
But...
ever since you appeared,
just being with strange men
doesn't fill the emptiness in my heart.
I'm scared.
I'm afraid I'll never...
be able to have you.
You must be crazy.
You're truly a madwoman.
That's right.
I've been with many men.
Are you throwing things at me now?
Yes.
Oh, wait...
What's wrong with me?
I feel strange.
I drugged the water beforehand.
You'll be fine soon.
That's right.
I've been with many men,
but ever since you appeared,
having relations with strangers
doesn't fill the void in my heart.
It doesn't fill the void in my heart.
No, Teacher!
Teacher!
Please!
That's right...
I've been with many men...
Are you okay?
Damn it!
That crazy woman hit me
and stole my clothes!
Where the hell
did that crazy woman go?
It hurts!
Please call the police for me!
There's nothing like glasses at the scene, right?
No.
Have you seen those people's S-lines?
The school staff only had one line originally.
It doesn't seem to be connected to the music teacher.
Why would she do something like this?
I don't know...
I probably won't ever know.
Do you think this incident is also related to the glasses?
No matter how I think about it, the glasses she always wore at school
seem to be the glasses we're looking for.
When she came to Miseong motel,
she looked completely different from how she did at school.
After she put on the glasses,
she must have felt special.
Detective,
no one is an exception.
That's why those glasses are dangerous.
Detective,
no one is an exception.
That's why those glasses are dangerous.
(Lee Soo-hyuk)
(Arin)
(And Lee Da-hee)
I was going to say it first.
Please give it to me.
The moment I put on these glasses,
Wow... what you said was true.
So I got goosebumps all over.
I don't believe you.
Throw those glasses away immediately!
It seems like a minor sexual assault has occurred.
Have you had sex?
No.
Why is she lying?
It seems like a lot has been happening at school lately.
Detective.
Is she a virgin?
You're wearing glasses!
Excuse me... are you free to have dMoteler with me sometime soon?
What?
'S LINE'
(A red line connecting people who have had sexual relations)