He'll be releasing a special, limited edition single album for the occasion, titled 'Trace of Emotion: Blue'. The album will also be a continuation of Dongwan's latest mini album released back in November, 'Trace of Emotion', which came in two versions - 'Gloomy' and 'Solitary'. 

The single album contains new title track "Reasons Why the Earth is Beautiful", as well as a handwritten letter, never-before-seen concert photos, MV behind footage, and more. It is set for release on December 7 at 6PM KST. 

Happy 10th anniversary as a solo artist, Dongwan!