High School! Kimengumi
The official fan club "Konyanko Club" run by Fujipacific Music was launched on 1 October. The number of fan club members peaked at about 190,000 during its operation. On 5 October, Onyanko Club had its first concert entitled "Kick Off" at Hibiya Yagai Ongakudo in Chiyoda, Tokyo. It was recorded and released as a video by Pony Inc. in the following month. On the same day as the first concert, Ushiroyubi Sasaregumi's first single "Ushiroyubi Sasaregumi" was released by Canyon Records. The single and its B-side were used as the opening theme and ending theme, respectively, of Fuji TV's anime "High School! Kimengumi", which was adaptation from the manga series. One of the reasons why Takai and Iwai were selected for the subgroup was that their images matched the anime's two girl characters named Kawa Yui and Uru Chie. Originally the subgroup was named "Kiwi-Gumi". 30,000 copies of the first single's front cover insert were printed with the name before a producer of "Yūyake Nyan Nyan" decided to change it to Ushiroyubi Sasaregumi. The first single peaked at number five on the Japanese single chart. On 21 October, Onyanko Club's second single "Oyoshi ni Natte ne Teacher" was released by Canyon Records. It debuted at number two on the single chart.