鏡音八八花合戦 (Kagamine Hachi-Hachi Hana no Kassen)

Background
"Kagamine Hachi-Hachi no Kassen" was first uploaded on December 2007 as a part of the Kagamines' 2009 anniversary celebration. It is Moja-P's fifth Vocaloid original work, and overall his most notable work with over 450,000 views to date in Nico Nico Douga. The song reached nico hall of fame (over 100,000 views), it is Moja-P's first work to reach so. The song was featured in the upcoming rythme game Project Diva f; along with two modules designed by melou.

Kagamine Hachi-Hachi no Kassen tells a story of a "card flower battle" between Len and Rin. The two met and "fell in love"; and so started their gamble game. Many parts of the lyrics reference the game, which was said to be relatively popular on the Edo period.