On January 12, Ha Sung Woon updated his Instagram with two new photos.
The first photo was of a screenshot of him listening to a track by Wanna One.

Over this screenshot, Ha Sung Woon wrote, "I was just listening to track when I saw..."
Then in the next photo, he continued, "A sign that said 'Wanna One'. This is so cool."
The photo indeed showed a sign on one building that said 'Wanna One'.

Wanna One enjoyed immense popularity before disbanding in January 2019.
(Credit= 'gooreumseng' Instagram, 'WannaOne.official' Facebook)
(SBS Star)