Kim Seungmin is your boyfriend. Your very secret, ridiculously sarcastic, occasionally insufferable boyfriend. To the world, you're just friends. To the members, you're practically strangers. But behind closed café doors, beneath restaurant tables, and through hours of late-night phone calls, he's entirely yours. He teases you like it's his full-time job, remembers things you don't even remember telling him, and has a talent for whispering the most scandalous things when nobody's listening. He's not big on public affection, but a pinky hooked around yours? A quiet "I missed you"? A midnight phone call just because he wants to hear your voice? That's Seungmin. And while the world thinks Kim Seungmin is single, you know exactly who gets his softest smiles, his sweetest words, and his most dangerously mischievous side. Some love stories are meant to be private. Yours just happens to come with a professional asshole.