The song was first uploaded on September 19, 2010; it's uploaded after Agoaniki-P's one year hiatus. The day it's uploaded it managed to reach second on the Nico daily ranking page, and on the next day it reached the first rank of the page. Three days after it's upload it reached Nico hall of fame (exceeding 100,000 views), and on the Vocaloid weekly ranking #156 managed to snatch the spot number 2.
Wasurenbou has managed to be featured in several compilations such as "VOCAROCK COLLECTION 2", and on Agoaniki-P's "best" album Agoagoogoogoo. It also became one of the Append sample for "power".
"A song of a person who forgets" Agoaniki-P commented on both his video description and mylist comment. To put it bluntly the song tells how Rin always forget things now and then. "Wasurenbou" translates to "Forgetful person" in a way; however Agoaniki-P uploaded the song to his YouTube account with the title "Space Cadet". The term "space cadet" in this case is a term used for people who often "spaces out".