The use as a concert venue was often refused by theaters and local governments due to protests by the PTA and the Jijoren, as well as by the media and the educational community. (Ai Akamatsu later revealed that his fainting was just acting. Ai Akamatsu then suddenly disappeared on May 5, 1969, and after appeared a month latter, he left the band after getting a call from a music distributor. To find a new replacement, Hideto and Toshio meet Yûsuke Natsu (later became a TV and film actor) and he joined the band who was planning to participate in the formation of another GS band, Olive, on May 10, but the GS gere was already sluggish around this time, and the popularity of Ox was beginning to fade. On May 31, 1971, when the GS boom came to an end, they perforce their last concert the at Ikebukuro's jazz cafe "ACB" and was finally disbanded in mid-1971.