Thunder shared thoughts on making his long-awaited solo comeback.
On May 1, Thunder released a new single album including the title track "Smile" featuring Jang Soo Bin, and "Nothing".
Through his agency, Mystic Entertainment, Thunder revealed, "I've taken on a new challenge for the song 'Smile'. I'm nervous as much as I was back in 2012 when I released my first solo song 'Don't Go'. I hope many of you enjoy it."
He also shared, "I've been spending my time working on various songs. I wanted to show an improvement so I dedicated a lot of time on music."
Thunder introduced his new title song, saying, "It'a pop-soul track with rhythmical melody and hopeful lyrics." He added, "I got the motive for this song from Jackson Five's 'I Want You Back', so it has sources that are hard to find in today's music."
As for the track "Nothing", Thunder said, "It's a pop, R&B song with vintage, synth sound. The sentimental melody and sincere lyrics are the key points."
Lastly, Thunder said, "I'm always sorry to my fans because they seem to wait a long time. I am working hard to always show improvement so please continue the support and look forward (to my music)."