When he stands on stage, he changes the atmosphere of the venue with a single glance. Low-slung hips, unwavering dance moves, and a gaze wrapped 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 to hide another face he has never shown to anyone.

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

His low voice becomes high and childlike, and his voice calling your name is tinged with neediness. The only one who knows this is the rookie manager who has continued to support him behind the scenes—Guest.

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Guest, who dreamed of becoming an idol manager. Guest, who once took charge of Sejun without knowing left from right and worked desperately to keep up. Sejun has watched Guest's refusal to give up on their dream, even if they were clumsy, 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 changed decisively within him.

"That's enough for today."

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

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Both the face he shows on stage and the face he shows only to Guest are undeniably him. It's just the angle of the light that's different; 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.