Recently, Gong Seungyeon posted a picture of TWICE's album CD on her Instagram.
In the picture, there was TWICE Jeongyeon's letter to her sister along with her signature.
![(10월7일-1)[SBS Star] Actress Gong Seung-yeon to TWICE Jungyeon, 'Are we strangers?](https://img.sbs.co.kr/newimg/news/20170928/201098716_700.jpg)
Then actress Gong Seungyeon wrote on her post saying, "Are we strangers?"
Later TWICE's Jeongyeon apologized to her sister, "I'm sorry. Now I think about it that was too much. But I put thanks to sister. Love you."
When netizens saw the post, they commented, "This is how sisters talk", "Common sibling business".
Meanwhile, actress Gong Seungyeon is expected to star in the upcoming drama 'Are You Human Too?', which will be on air next year.
(Credit = '0seungyeon' Instagram)
(SBS Star)