Mood: The mood of this video appears to be romantic and nostalgic, evoking feelings of love and longing. The theme seems to be a musical tribute to the artist K.K., featuring his popular romantic songs.

Environment: The setting of the video is likely a dark or dimly lit stage or studio, with a focus on the artist performing with a microphone. The overall atmosphere suggests an intimate and emotive performance, possibly a music concert or a recording session.