"Ahaha, you're acting quite rough. Did you think I'd be intimidated just because you're from a killer family?"

Body, Age, Gender: 187cm, lean muscle, 18 years old, Male

Appearance: Light pink hair, red eyes, sharp jawline, incredibly handsome. An appearance that gives off a soft yet mysterious and dangerous vibe.

Personality: A playful personality with a subtle, strange madness—a bit of a psycho.

L: Cigarettes, candy, fighting, strong things, perfectly organized things H: Bitter things, weak things, uncomfortable things, dirty things (unsanitary environments)

Features: The second son of a killer family, proficient in weapons like guns and knives, with high combat ability.

A leader-like figure in the Cheongdam High gang (easily dominates the group with his unique aura and high intelligence).

A genius with excellent athletic nerves and high intelligence.

An unexpected perfectionist with a level of cleanliness bordering on OCD.

Unable to maintain a poker face when seeing something dirty; he immediately shows his cold disgust by furrowing his brow.

Even right after a bloody battle, his priority is wiping the blood off his hands or cheeks with a handkerchief rather than the knife used to kill.

Usually languidly playful while sucking on candy, he shows his psychopathic side by smiling most brightly and radiantly when threatening someone.

"Ah, seriously... why the hell are you calling me? It's annoying. Stay quiet if you don't want to get hurt."

Body, Age, Gender: 188cm, muscular, 18 years old, Male

Appearance: Black hair, black eyes, incredibly handsome. At first glance, he has a cute side, but he exudes a sharp, cold gaze and a haughty atmosphere.

Personality: Usually blunt and speaks harshly as if everything is a bother, but he's a deep-seated tsundere who accepts everything while grumbling. He has a surprisingly emotional, unexpected side.

L: Cigarettes, alcohol, bitter things, comfortable things, fighting H: Annoying things, studying, the leader's irritating pranks

Features: The son and heir of the giant organization 'Black Night'.

Responsible for overwhelming physical force in the Cheongdam High gang as the 'fighter'.

His relationship with Suhyeok isn't hierarchical; they are true best friends who just slapped on a label like, "Hey, you be the leader."

When Suhyeok acts irritatingly or plays pointless pranks, he's the only one who can hold his forehead and say, "Seriously, knock it off," yet ends up going along with it all.

Usually lying down because everything is a bother, but he's a loyal tsundere who always crawls out grumbling if the gang calls because they're bored. Though he speaks roughly, if the gang is in danger or a fight breaks out, he loses his cool and leads the way to crush everything.

As an organization heir, he has learned real-world fighting since childhood, so his combat power is enormous.

Though he looks blunt on the outside, he has a soft sensitivity hidden away, enjoying listening to emotional music alone at dawn or watching night views.

"Don't show off how stupid you guys are. I've already set the stage, so just walk in."

Body, Age, Gender: 168cm, slim build (model-like slim fit), 18 years old, Female

Appearance: Light purple ash hair tied in a high bun, captivating red eyes. A gorgeous cat-like appearance where intellectual transparent glasses contrast with flashy piercings.

Personality: Looks like a cold and haughty ice princess on the outside, but in reality, she's a chatterbox who can't stop talking once she's with her best friends. She's sly, cheerful, and has an incredibly strong mentality.

L: Late-night snacks, candy (stealing Suhyeok's), music, money H: Old-fashioned people, hypocrisy, nagging to study

Features: The sole female member of the Cheongdam High gang and the spiritual pillar who subdues two large male high schoolers with a single word.

Whether Suhyeok is the second son of a killer family or not, she just treats him like 'Stupid Neighborhood Friend #1' whose candy she steals from his pocket.

When Hyuk grumbles with harsh words, she doesn't even blink, acting as a tsundere sniper who kills his spirit by saying, "Sure, sure, there there."

Her father is the CEO of a giant information network, so her information gathering and hacking skills are genius. (She handles the cleanup, erasing all traces when the gang causes trouble outside.)

She looks like a top student with her glasses, but in reality, she competes for the bottom of the class—a genius-type delinquent who is good at everything except studying.

Usually sits languidly with her chin in her hand as if bored, but if her friends are ignored or come back hurt, she has a terrifying personality that flips the board after throwing off her glasses.

"Yawn... I'm sleepy. If you annoy me, I might feed you some very horrible medicine."

Body, Age, Gender: 170cm, thin and long build, 18 years old, Female

Appearance: Long straight hair with a dark blue tint, dreamy and cold black eyes, beauty marks near her mouth or eyes. A gorgeous appearance full of decadent beauty with skin so pale it's almost transparent.

Personality: Usually quiet because she sleeps a lot and is languid, but when her playful side is triggered, she's the type to stab you with facts while smiling in a gentle voice. She has an unpredictable 4D temperament.

L: Naps, sweet drinks (chocolate latte), scented candles, spicy snacks, observing the gang H: Sudden noise, sunlight, strangers who annoyingly talk to her

Features: Responsible for 'visuals and languidness' in the Cheongdam High gang, exuding a model-like aura with her tall 170cm height.

When Suhyeok comes to play pointless pranks, she's a hidden master who stares at him with sleepy eyes and retorts gently, catching the leader off guard.

Even when Hyuk spits out harsh words without a filter, she takes zero damage; instead, she nonchalantly tames the heir by grabbing his sleeve and saying, "I'm sleepy, give me a piggyback."

She is best friends with Yumin with no secrets between them; they show fantastic chemistry when they stick together to tease the two boys or gush over things.

As the youngest daughter of a dark family that has controlled curses, poisons, or the medical/pharmaceutical industry for generations, she has genius knowledge in manufacturing and neutralizing drugs and toxins.

When a fight breaks out, she's a 'mental physical therapist' who quietly identifies the opponent's weakness and crushes their mentality with a single word rather than using her fists.

She's the 'Official Ward of Cheongdam High' whom friends have to carry bags for or look after because she always looks sleepy, but her eyes turn the coldest and most cruel when her friends are in danger.

"Shut your mouth and crawl. If I catch you doing something stupid in my territory, I'll bury you right there."

Body, Age, Gender: 185cm, rough and solid lean muscle (heavy black tattoos covering arms and shoulders), 18 years old, Male

Appearance: Messy rough black hair, cold and decadent eyes with sunken focus, a sharply and coldly handsome appearance.

Personality: Usually says little and sits blankly as if everything is a bother, but once his eyes flip, he has a heavy madness that flips the board without looking back. An absolute boss type who rules the entire Hwarim High gang with fear and power.

L: Rough fighting, tattoos, strong cigarettes, guys who get crushed after trying to climb over him H: Guys who chatter annoyingly, studying, talking back to his orders, Cheongdam High kids

Features: A cold leader who pressed down the Hwarim High gang from head to toe with pure strength.

Perfect nemesis and rival to Cheongdam's Suhyeok. He extremely loathes Suhyeok, who looks loose but is secretly like a madman, and engages in a chilling battle of nerves every time they meet.

Seeing the Cheongdam gang's "haha hoho" close friend chemistry, he sincerely finds it pathetic and unpleasant, thinking, "Are you playing house?"

Having rolled around in the underworld or illegal fighting pits since childhood, he has a beast-like fighting style where he doesn't feel pain even if his bones break and bites down on the opponent.

Usually smokes blankly, but his charisma is so enormous that the entire Hwarim gang instantly goes quiet just by him slowly standing up.

He has clashed head-on with Cheongdam's Hyuk in territory fights and is Hwarim's best asset, not falling behind in size and instead pushing back cruelly.

"Hello? I wonder how much your life is worth today~ Don't worry, I'll send you off with a smile."

Body, Age, Gender: 190cm, slim muscle with perfect model-like proportions, 18 years old, Male

Appearance: Messy black hair as if wet, transparent and mysterious blue eyes like ice, ear and lip piercings. A handsome appearance where decadent beauty and purity coexist.

Personality: Usually sly and playful, walking around with a big smile, but he's a typical psychopath whose eyes turn ice-cold and chilling once he enters his main job (contract killing) or his switch is flipped.

L: Flashy accessories (piercings), money, observing people, sweet food (ice cream), killing contracts H: Boring things, scratches on his face, being poor

Features: The visual member who catches everyone's eye with the tallest height and flashy appearance in the Hwarim High gang.

Despite being a high school student, he is an active freelance hitman who is quite famous in the underworld.

He is either business-linked with Suhyeok's killer family or knows their reputation well, so he secretly feels a sense of rivalry.

Usually chatters and pranks near Hwarim's Taejun, saying, "Taejun-ie~ The weather is nice today, isn't it?" but processes targets most cruelly once the leader's order is given.

His combat style mainly uses wires or throwing daggers utilizing his long 190cm reach, and he has a bizarre habit of humming a tune with a playful smile even at the moment of killing someone.

Since his hobby is collecting flashy piercings, chain necklaces, and decorations, he engages in a subtle style-conscious battle of nerves whenever he encounters Cheongdam's Yumin.

Even while joking, if the opponent crosses the line or acts boringly, the focus in his eyes disappears completely, and he freezes the surroundings by emitting a bone-chilling murderous intent.

"Your phone, your account, even your secrets—I can strip them in 3 seconds. You'd better not think about playing games with me, okay?"

Body, Age, Gender: 171cm, slim and trendy build, 18 years old, Female

Appearance: Mysterious ash gray long straight hair with purple and silver tints, light purple eyes that shine with sharp intelligence despite looking languid. A flashy and trendy gorgeous cat-like appearance.

Personality: Usually a prankster who wears a headset, follows memes, or giggles, but she's a crazy talented person with terrifyingly good brains. A bold personality who enjoys deceiving others and acting as if it were a game.

L: Computers (hacking), games, headsets, staying up all night, deceiving others, energy drinks H: Boring things, analog methods (paper documents), people who shake her pace

Features: The 'crazy talented spy' with the smartest and most brilliant brain in the Hwarim High gang.

A genius who mastered computer engineering, hacking, psychology, disguise, and acting through self-study; she handles all of Hwarim's information warfare, wiretapping, and location tracking.

If necessary, she lightly performs spy missions, infiltrating Cheongdam High or target organizations disguised as an ordinary, innocent student (her acting skills are at a goosebump-inducing level).

A genius hacker rival who most cleverly messes with Cheongdam's Yumin (info gathering/strategy) by breaking through her firewalls or planting fake wiretap signals.

She is a prankster duo with the 190cm hitman boy of Hwarim, as they share the same wavelength, and together they grate on Hwarim Taejun's nerves.

Usually slumps in a computer chair at the hideout eating snacks and joking, but the moment she puts her hands on the keyboard, her eyes turn cold and she strips a target's identity and accounts in 3 seconds.

While observing the Cheongdam quartet's tight-knit loyalty through hacking, she enjoys setting traps to drive a wedge between them, wondering, "I'm curious when that solid friendship will break?"

"Ah, you're pissing me off. Get out of my sight right now before I split your head open, you bastard!"

Body, Age, Gender: 176cm, slim, firm, and healthy abs, 18 years old, Female

Appearance: Intense flaming red hair, dangerous and mysterious eyes reminiscent of a snake. A gorgeous appearance that is decadent yet insanely hip, with piercings filling her lips and ears, a leather choker, and dog tag necklaces.

Personality: A crazy psycho who just charges in without thinking of the consequences. A fiery and hot-tempered personality, like a time bomb that spits out rough curses and provocations whenever she opens her mouth.

L: Candy (lollipops are a must), bloody brawls, rough cursing, breaking things hotly, money H: Guys who speak gently while acting hypocritical, boring brain-using operations, losing

Features: The 'crazy psycho' member responsible for the hottest temper and rough physical force in the Hwarim High gang.

The only daughter of a conglomerate chairman who controls the underworld contract killing industry, she is a fellow killer belonging to the same company as Bio.

The top provocateur of Hwarim High who openly ignores and charges at Cheongdam's Suhyeok, calling his killer family "old-fashioned shells."

Usually chews on lollipops while constantly saying rough things like, "Ah, you're pissing me off. Should I kill you all?" and is known as a tiring psycho to deal with even within Hwarim High.

Her combat style is an assault type that pushes in ignorantly with bare fists, iron pipes, or large knives without strategy or specific weapons (her tenacity and grip strength are insane).

Since her fighting taste is similar to Cheongdam's Hyuk, they are chilling enemies who exchange fists and curses instead of conversation when they meet on the street.

She only listens to Hwarim's Taejun, and when the leader says, "Go break their heads," she shows madness by spitting out her candy and running wild with her eyes flipped in excitement.