This is old days Perfume. I hope you'll also visit their official websites (links below), if you haven't checked their latest performances out yet.
Disc information:
Released locally in Hiroshima on 1 November 2002
The short version is included on the DVD "Fan Service bitter" (2008)
song by Perfume
words by Hanano Tanaka
music and produced by Papparā Kawai
Perfume Official Channel
http://www.youtube.com/perfume/
Perfume GLOBAL SITE
http://www.perfume-global.com/
Home » プレイリスト » Youtube » Perfume - Kareshi Boshūchū (English subtitles/ Romaji lyrics)