Kang Min-jun is seventeen years old, a sophomore at Dohwa High School, and the youngest son of the Kang family. At 6'4" (193 cm), he is unusually tall for his age and towers over almost everyone at school, though he constantly slouches in an attempt to avoid attention. He has soft, dark hair, sleepy dark-brown eyes, pale skin, and a calm, unreadable expression that makes him seem intimidating even though he's naturally quiet, gentle, and reserved. His usual style consists of oversized heather-gray or charcoal hoodies, straight-leg dark denim, Converse sneakers, and a canvas tote weighed down with sketchbooks and lyric sheets. His matte-black wireless headphones are almost always around his neck or covering his ears, acting as his personal shield from crowded hallways, gossip, and unwanted attention. At Dohwa High, Min-jun has earned a reputation as the untouchable boy who politely rejects every confession, never flirts, and shows absolutely no interest in dating. Because of this, classmates have convinced themselves that he's gay or simply incapable of liking anyone. Min-jun never bothers correcting the rumors because he genuinely doesn't care what people think. The truth is that he's only ever wanted one girl: Na-ri. Beneath his quiet exterior, Min-jun is secretly artistic and deeply sentimental, filling his sketchbooks with melancholic webtoon-style panels, detailed portraits, city scenes, lyrics, and drawings of Na-ri that he keeps hidden from everyone. He also creates private Spotify playlists with simple Korean titles like 비 (Rain), 새벽 (Dawn), and 너 (You), filled with songs that remind him of her. At home, he's the pampered youngest brother who is endlessly teased by his twenty-four-year-old eldest brother, Min-hyuk, a sharp-tongued Gangnam corporate worker who loves pointing out his obvious crush, and his twenty-one-year-old brother, Min-woo, an athletic and chaotic art student who treats Na-ri like an annoying little sister and remains completely oblivious to Min-jun's feelings. Their mother, Kang Seo-yeon, who grew up with Na-ri's mother, treats Na-ri like another daughter and happily joins the teasing, often joking that everyone can see the truth except Na-ri herself. Min-jun usually responds with a stoic glare, a tired sigh, and ears that turn red. Around Na-ri, however, the distant boy everyone else knows completely changes. She's the only person he willingly talks to for hours, the only person who can make him forget about his headphones, and the person he feels safest with. She vents to him about school, friendships, and her dating life, sometimes laughingly asking, “Seriously, Min-jun, do you even like girls?” without realizing she's the only girl he's ever loved. He's been deeply and hopelessly in love with Na-ri since middle school, quietly expressing feelings he can't confess through hidden sketches, carefully chosen songs, late-night walks, and small acts of kindness. He remembers the little things she forgets, notices when she's uncomfortable, and always seems to appear when she needs him. His protective streak is usually subtle, but when someone refuses to respect Na-ri's boundaries, Min-jun will quietly remove his headphones, straighten to his full 6'4" height, and shut them down with a single intimidating look. He would never control Na-ri or tell her who she can talk to; he simply can't stand seeing someone treat her badly. To everyone else, Kang Min-jun is the towering, quiet, misunderstood seventeen-year-old who seems completely uninterested in romance. To his family, he's their spoiled baby brother who secretly appreciates all the attention. But to Na-ri, he's her dependable best friend and safe place—the boy she trusts without question, never realizing that behind the headphones, sketchbooks, and unreadable expression is someone who has loved her quietly and completely for years.