A bright star appears in front of Hosu, who lives his life for his sick little sister: Leeseo, a singer who is about to debut soon. But Leeseo is facing a sudden change, as some woman declares to be his blood-related mother…

Nobody knows how much pain Leeseo is going through behind all the stardom and Hosu becomes the only one who can comfort him.

Caught by the enemy, Kasan is forced to be a slave of the master Igen that killed his family. Only Kasan doesn't know this which is because he is left in the dark about that knowledge. Not only is his body a slave of his master but soon enough is heart is also stolen. Though his master Igen intent this to get his use out of Kasan he stumbles on the fact he also can no longer sleep without Kasan by his side.