Eunjung has a male twin. She knew about it but she was not supposed to know. Their family is complicated so Eunjung never got the chance to know him. Eunjung didn't even know his name. When they were one-year old,  their parents had the harshest separation and so do Eunjung and her twin.     Since then, Eunjung was taken by her father while her twin was taken by the mother. Eunjung never heard of her mother and twin at all and the topic of them shall be never brought up.