Meng Jia are one of Bang Cheolyong childhood friend. They were best friend and they attend the same school until now. So they knew each other for a long time. They has same skill, so they in the same class. More of event that makes them close to each other. More and More comes one after another. They didn't who's behind it.. They didn't noticed s/he were taking so much step just for broke their friendship. But s/he didn't know, that her/his plan just make their bond stronger