鬼ヶ島ノ死闘 (Onigashima no Shitou)

Background
This song is based on the japanese folklore Momotaro, with Len playing as Momotaro, Kaito as the dog, Gackpo as the monkey, VY2 as the peasant, Rin as the demon chief and Miku, Lily and Gumi as other demons.

This song was released on If the World.