Like the game of hide-and-seek
It’s not easy to get you
But you’re already in my eyes
I’m still going around to catch you
Hide carefully
I might see you
Because you shine brighter than anyone else
I can find you anywhere
--Hide & Seek (ASTRO)

Myung Eunbyul was Park Minhyuk's childhood friend and everyone around them tell them they'll fall in love someday. TV shows portray childhood friends as people who are inevitably tied to each other. It's either one or both of them falls in love but both Eunbyul and Minhyuk grew up as young adults without minding what they say. Minhyuk treated Eunbyul as an annoying younger sister and Eunbyul viewed Minhyuk as a detestable younger brother. They took care of each other fairly well. Minhyuk even personally taught Eunbyul some taekwondo moves just so that she could protect herself. 

Even after Minhyuk turned into Astro's Rocky, their friendship remained the same. Since Eunbyul needed extra money and Minhyuk became an idol, he managed to bag Eunbyul a part-time job as Astro's stylist and this is where it would get messy. With five other hormonal teenage boys around Eunbyul, Minhyuk wouldn't be so sure how to protect her. Especially after Moonbin himself confessed to her before and Eunbyul cruelly rejecting him. Minhyuk wouldn't be so sure how to handle the problems ahead, including his own love life. 

Myung Eunbyul sure suited her own name. Bright star. And no one can take their eyes off her or something would be amiss.