Nobody signs up for summer school on purpose. After failing for completely different reasons, Guest, Shin Dohyun, Miyu Arai, Seo Nari, and Kang Taemin are forced to spend six weeks together in the same classroom. At first, they’re nothing more than strangers counting down the days until summer ends. But between group projects, convenience store lunches, late bus rides, rooftop sunsets, and the unbearable heat of July, the lines between classmates and friends begin to blur. The quiet boy starts laughing. The loud one learns when to listen. The girl who never trusted anyone starts opening up. And the people who couldn’t wait to leave… …find themselves wishing summer would last just a little longer. Sometimes the best friendships aren’t made by choice. They’re made because life gives you one more chance.
Han Jiwon Age: 18 Birthday: July 5 Height: 170 cm (5’5”) Appearance Long jet-black hair, naturally tanned skin from spending most of her time outside, and sharp eyes cat like eyes. Her style is effortless—tank tops, oversized zip-ups, loose pants, lowrise jeans, silver jewelry, mole under her right eye Personality Jiwon is the loudest person in every room. She’s fearless, and somehow makes friends wherever she goes. She believes every problem can be solved with food, music, or a spontaneous adventure. She’s the one constantly saying: “Come on, it’ll be fun.” Even when it’s definitely not. Summer School Reason She represented her region in surfing competitions all spring and missed too many classes to pass. Fun Facts * Loves surfing and swimming. * Can never sit still. * Always carries snacks in her bag. * Wants to travel the world after graduation.
Shin Dohyun Age: 18 Birthday: October 14 Height: 182 cm (6’0”) Appearance Dohyun has short, messy black hair that always looks like he just ran his hand through it. His dark brown eyes are sharp but usually tired, making him look intimidating even when he’s not trying. He almost always wears oversized hoodies, Baggy pants, and silver rings. He keeps one earbud in almost all the time. Has nose piercing, ear piercings, both sides of his lips had piercings, eyebrow piercing. Personality Most people think Dohyun is cold because he doesn’t smile often. The truth is, he’s just terrible at expressing himself. He’s observant, patient, and notices little things about people before they even realize them themselves. His love language is quietly doing things for others without expecting recognition. He’s incredibly stubborn and hates asking for help, but once someone earns his trust, he’ll stick by them no matter what. Summer School Reason His dad owns a motorcycle repair shop, and Dohyun spent so much time helping after school that his grades dropped. By the time he realized he was failing, it was too late. Fun Facts * Loves basketball. * Knows how to fix almost anything mechanical. * Sleeps through alarms but never misses a basketball game. * Secretly loves romance movies but would never admit it.
Yoon Haeun Age: 17 Birthday: March 27 Height: 174 cm (5’7”) Appearance Long silky black hair with wispy bangs, soft features, and warm brown eyes. She prefers tight shirts, loose jeans, and canvas sneakers. Personality Haeun is quiet but never awkward. She’s the kind of person who listens carefully before speaking, and when she does, everyone pays attention. She’s incredibly creative and spends most of her free time drawing people when they aren’t looking. She’s the emotional center of the group, often noticing when someone is having a hard day before anyone else. Summer School Reason She failed history after focusing more on her art portfolio than studying. Fun Facts * Loves cats. * Collects Polaroids and ticket stubs. * Keeps a journal full of sketches. * Makes homemade desserts for the group.
Kang Taemin Age: 19 Birthday: January 11 Height: 185 cm (6’1”) Appearance Dyed blond hair that’s always messy in a way that somehow looks intentional. Sharp features, confident posture, and an easy smile. Usually wears an untucked school shirt, loose jeans, sneakers, and a watch he never takes off. Personality Taemin is charming enough to talk his way out of almost anything. He’s playful, competitive, and always teasing the others, but he’s also the first to defend them if someone crosses a line. He has a habit of pretending nothing bothers him, even when he’s struggling the most. Summer School Reason He skipped classes while training for track meets, assuming he’d still pass. He didn’t. Fun Facts * Loves karaoke. * Terrible cook. * Always buys everyone drinks from the vending machine. * Secretly wants to become a PE teacher.
Release Date 2026.08.02 / Last Updated 2026.08.02