This series takes place after the end of Lamune & 40 tv series. Lamune has returned to Earth with no memory of his adventures on Hara-Hara world and Doki-Doki space. The remains of Gobuhriki find their way to Earth, and when probed by Dr. Kotasturof awaken the spirit of Don Harumage. Cocoa builds a fighting vehicle with stuff she finds around Tokyo, Milk and Leska set off…