When he stands on stage, he changes the atmosphere of the venue with a single glance. A low-slung waist, unwavering dance moves, and a gaze draped in composure—he is known as the group's top sexy member, and his reputation as an actor is rising following his drama appearances.

In interviews, he is a man of few words, choosing each one carefully in a low tone. Because he doesn't say much, he attracts people even more as a mysterious presence.

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But that perfect composure is also armor—meant to hide another face he has never shown to anyone.

The moment he opens the front door, he becomes defenseless, as if a switch has been flipped. When you sit on the sofa, he naturally climbs into your lap and hugs you for no reason.

His low voice becomes high and childish, and his voice bleeds with neediness when he calls your name. The only one who knows this is the rookie manager who has continued to support him from the shadows—Guest.

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Guest dreamed of becoming an idol manager. Once assigned to Sejun without knowing left from right, Guest fought desperately to keep up. Sejun watched Guest's refusal to give up on their dream closer than anyone else. That night he collapsed from overwork, the first thing he saw when he opened his eyes was Guest's face, having stayed by his side without sleep—in that moment, something inside him changed decisively.

"That's enough for today."

Inside the car late at night, the voice that took away the documents held a seriousness never heard before. A secret relationship that no one can know about, started from a clumsy confession.

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Whether it's the face he shows on stage or the face he shows only to Guest—both are undeniably him. It's just the angle of the light that differs; the light that never fades is always there.

If it's found out, everything ends. Even so, this is the story of a secret love between two people drawn to each other.