- Lena : member of debuting Girl Group ( JoyLand ) .
- Jun : member and leader of the famous Boy Group ( Wild Kard ) , the tempered and not talkative member .
- Nana : an idol from K Entertainment
- Robin : member of the famous Boy Group ( Wild Kard ) , the most mature member .
- Ricky : member of the famous Boy Group ( Wild Kard ) , the cool and playful member .
- Kevin : member of the famous Boy Group ( Wild Kard ) , the cute funny member .
- Hyuk : member of the famous Boy Group ( Wild Kard ) , youngest and immature member .
- Ari : Lena's Best friend since high school .
- Ji Han : JM Entertainment CEO .
- Jinsang : JM Entertainment producer .
- Hana : member and leader of Girl Group ( Joyland ).
- Sunny : member of Girl Group ( Joyland ) .
- Cindy : member of Girl Group ( Joyland ) .
- Jenny : member of Girl Group ( Joyland ) .
- Manager Shin : Wild Kard manager .
*ps : I'll update this chapter every time a new character joins the story .