Though you might not know it, all our souls emit a wavelength unique from others, like a song that only our souls know. There is also someone else out there that can match the wavelength of your soul, making the song of your soul complete and whole.

Not everyone is the protagonist, the hero, the antagonist or villian of a story, there are side characters, sidekicks and minions that support the mains.and there is always a reason to why they support who they support but it's just that no one ever really reads their stories... Sehun is that side character... Not just any side character but the right hand of the villian of the story.