On December 6, T.O.P updated his Instagram with a video.
The video showed a book cover that had Lee Byung Hun on.
There was also his autograph on the bottom of the cover.
When T.O.P opened the book, there was a writing which said, "To my brother Choi Seung-hyun (T.O.P's real name).
Under this post, T.O.P wrote, "So proud of you, my mentor."
Since then, they were spotted having a meal together, exchanging gifts, mentioning each other on social media and so on.
(Credit= 'choi_seung_hyun_tttop' Instagram, Online Community)
(SBS Star)