Descrição
Ninjutsu...!
In Japanese, "herbivore type" refers to someone's approach to relationships; namely, that they're passive in seeking a partner. So the "passive girls" line was originally a play on that and Triceratops being actual herbivores.
"Koedo" essentially means "Little Edo," so in Japanese, the upgrade to that was... "Medium Edo."
Original video: http://www.nicovideo.jp/watch/sm12669291
All videos: http://www.nicovideo.jp/mylist/13069461