The original song sung by Hatsune Miku was uploaded on February 29, 2008. It was well received with over 300,000 views; however, Luka's version uploaded a year after the original on May 26, 2009, entered "Vocaloid Hall of Fame" with 100,000 views six days after it was uploaded, and reached 1 million views on November 5, 2011.
Miku's version illustrated by various illustrators from piapro such as Kab, nyan_nyan, and kyky; Luka's version illustrated by Moka Ichiyo, background by Geshi and video by Mieno-hito.
The song tells of a woman who "never misses the water until it's gone". She realized her happiness and love for a man only after he left for war. In the end, she watched the man out to war and promised to love him for eternity.