This is another song that is stuck on replay in my playlist. It is sung by a virtual singer (http://vocaloid.wikia.com/wiki/Hatsune_Miku) who even held real concerts in Japan, USA and Singapore. It was one of the videos of the concerts that I got to know about her and fell for this song. That video for the Japan concert has since been removed but the owner uploaded another one from the Singapore concert. Thank you very much SeyrenLK, who works with the Vocaloid software.
*Updated Jul 28, 2023
Replaced removed video with a new one.