It's said that Shena Ringo met Tabuchi Hisako at Teen's Music Festival. Tabuchi Hisako was Number Girl's guitar. Mukai was Number Girl's vocal and Zazen Boys' vocal later.
Tabuchi Hisako also made her appearance on
Hatsuiku Status Gokiritsu Japon and Gibbs single.
And Soil & Pimp Session connection :
Tabu Zombie and Moto(Soil&Pimp Session members) was the member of Evil Vibration(Shena Junpei, Ukigumo, Hata Toshiki also was the members).
http://www.motionblue.co.jp/schedule/2003/04/index.html