On January 28 at 6 p.m. KST, Ha Sungwoon released a digital single featuring Park Jihoon!

It was revealed that "Don't Forget" is a song that the artist has been working on for a while thinking about Wannables. Through the song, he delivers a message on his feelings following Wanna One's disbandment. He asks fans not to forget him, the memories that they have made, and the different things he felt due to the disbandment.

He also received support from Park Jihoon on instagram and Bae Jinyoung on his official fancafe.

Check out Ha Sungwoon's single above!