Is it Okay for a Murderer to be an Idol?

[Witnessing the murder scene of a member from the same idol group.] Lee Yumin, making his second group debut, begins promoting with the determination that this time he will absolutely not fail and will succeed no matter what. While practicing ahead of an important year-end awards stage, he ends up witnessing the group leader, Han Segye, committing a murder.. While Segye threatens him to keep it a secret for the sake of the group, he also begins to shower Yumin with even more forward physical affection than before. This makes Yumin feel his heart flutter, leaving him deeply confused… “Am I crazy…? Why is my heart racing for a murderer?!” A cold-blooded killer, yet also the gentle team leader and older brother of the group. which of the two is Segye’s true self?