"Ai Ai Fire!!/Watashitachi (with Friend)" is the first single released by Up Up Girls (Kari) in 2018. It featured two songs, Ai Ai Fire!! and a new version of Watashitachi featuring the band the Inazuma Sentai.
- Ai Ai Fire!!
- Lyrics: NOBE, Composition: michitomo, Arrangement: KOJI oba
- Lyrics: Uenaka Jyoya, Composition: Kubo Hiroyuki, Arrangement: Michitomo, Band: The Inazuma Sentai
- Ai Ai Fire!! (Instrumental)
- Watashitachi (Instrumental)
This single entered the chart on Nov. 5 at 6th place. It was out of the top 30 the next 3 days, but went back up to 9th by the fourth day. The fifth day, 11/19, it was 24th and on 11/20 it was 10th place. On the weekly singles ranking, it took 21st place with a total of 3,869 reported sales.
- ↑ "アプガ（仮）、イナ戦演奏の「私達」含む新作発売＆念願全曲ライブ開催" (Japanese). Natalie Music. 2018-09-15.
- ↑ 2018-11-05 Oricon Daily Singles Ranking (Japanese). Oricon News. 2018-11-06.
- ↑ 2018-11-19 Oricon Weekly Single Ranking (Japanese). Oricon News. 2018-11-14.