Characters: 

Kim Taeyeon: The arrogant hallyu star who thinks so highly of himself. But is quite insecure when it comes to acting. He thinks highly of himself, but is rather lonely when he arrives home. 25 year old singer who has been singing for 3 years now. 

Tiffany Hwang: A young 24 year old struggling to keep jobs to provide for herself and her seven year old daughter. Trying to earn as much as she can, to make her daughter proud of her.

More character description later. 
But the list of characters: 

Sunye, Seohyun, Taecyeon, Sulli, Yuri... etc.

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