Reason!!

Reason!! is the 1st opening theme song for THE iDOLM@STER: SideM anime. It is performed by 315 STARS.

In Game

 * THE iDOLM@STER SideM: LIVE ON ST@GE!

In Adaptions

 * THE iDOLM@STER: SideM anime - Opening theme song (Episodes 2-12), insert song (Episode 13)

In Concert

 * THE IDOLM@STER SideM 3rdLive Tour ~GLORIOUS ST@GE!~ LIVE Side MAKUHARI (performed by: Shuugo Nakamura, Yuuma Uchida, Taku Yashiro, Shun Horie, Tomohito Takatsuka, Yuuichirou Umehara, Shou Kano, Kouhei Amasaki, Makoto Furukawa, Daiki Kobayashi, Takuya Komada,Takeaki Masuyama, Toshinari Fukamachi, Yutaka Balletta, Daiki Yamashita, Yuya Nakada,Shou Nogami, Shouya Chiba, Yuusuke Shirai, Takuma Nagatsuka, Hiroshi Watanabe, Junta Tereshima, Shouhei Komatsu, Daiki Hamano, Shunichi Toki, Yuusuke Nagano, Jun Kasama, Fumiyoshi Tsuoya, Wataru Komada, Yuko Sanpei, Takehiro Urao, Tatsuya Tokutake, Shougo Yano, Keisuke Furuhata, Ayumu Murase, Yoshitaka Yamaya, Takeru Kikuchi, Kentaro Kumagai, Kento Hama, Takuya Masumoto, Kento Ito, Jun'ya Enoki, Yoshiki Nakajima, Takuma Terashima, Daichi Kanbara, and Yoshitsugu Matsuoka (Day 1), Shuugo Nakamura, Yuuma Uchida, Taku Yashiro, Shou Karino, Kouhei Amasaki, Makoto Furukawa, Daiki Kobayashi, Takuya Komada, Shunichi Toki, Yuusuke Nagano, Jun Kasama, Fumiyoshi Tsuoya, Wataru Komada, Kento Ito, Jun'ya Enoki, and Yoshiki Nakajima (Day 2))


 * THE IDOLM@STER SideM 3rdLive Tour ~GLORIOUS ST@GE!~ LIVE Side SENDAI (performed by: Junta Tereshima, Shouhei Komatsu, Daiki Hamano, Shou Nogami, Shouya Chiba, Yuusuke Shirai, Takuma Nagatsuka, Hiroshi Watanabe, Yoshitaka Yamaya, Takeru Kikuchi, Kentaro Kumagai, Kento Hama, Takuya Masumoto, Shougo Yano, Keisuke Furuhata, Ayumu Murase, Takeaki Masuyama, Toshinari Fukamachi, Yuko Sanpei, Takehiro Urao, and Tatsuya Tokutake)


 * THE IDOLM@STER SideM 3rdLive Tour ~GLORIOUS ST@GE!~ LIVE Side FUKUOKA (performed by: Shun Horie, Tomohito Takatsuka, Kento Ito, Jun'ya Enoki, Yoshiki Nakajima, Junta Tereshima, Shouhei Komatsu, Daiki Hamano, Shou Karino, Kouhei Amasaki, Makoto Furukawa, Daiki Kobayashi, Takuya Komada, Shougo Yano, Keisuke Furuhata, Ayumu Murase, Jun Kasama, Fumiyoshi Tsuoya, and Wataru Komada)

CD Recordings
THE IDOLM@STER SideM ANIMATION PROJECT 01 "Reason!!" (sung by: 315 STARS ) THE IDOLM@STER SideM ANIMATION PROJECT 02 "TOMORROW DIAMOND" (sung by: Beit) THE IDOLM@STER SideM ANIMATION PROJECT 03 "From Teacher To Future!" (sung by: S.E.M) THE IDOLM@STER SideM ANIMATION PROJECT 04 "AFTER THE RAIN" (sung by: W) THE IDOLM@STER SideM ANIMATION PROJECT 05 "Over AGAIN" (sung by: Jupiter) THE IDOLM@STER SideM ANIMATION PROJECT 06 "Sunset★Colors" (sung by: High×Joker) THE IDOLM@STER SideM ANIMATION PROJECT 07 "ARRIVE TO STAR" (sung by: DRAMATIC STARS) THE IDOLM@STER SideM ANIMATION PROJECT 08 "GLORIOUS RO@D" (sung by: 315 STARS )