What's Go Shijima's Reason to Fight?

What's Go Shijima's Reason to Fight? (詩島剛が戦う理由はなにか) is the twenty-seventh episode of Kamen Rider Drive. It features the in-series debut of the Ride Booster Set following its initial appearance in the Rider Grand Prix of Super Hero Taisen GP: Kamen Rider 3.

Synopsis
Shinnosuke and the rest of the Special Unit are now more confident thanks to the new Ride Booster support vehicles. Kiriko and Go eventually get into an argument whether to trust Chase or not as a Kamen Rider. Later, Shinnosuke joins a joint investigation from the Central Government Office where Brain (in his human form) tries to frame Shinnosuke, whom is already aware of Brain's involvement in the division. Meanwhile, a girl named Yoriko seeks Go's help as her brother was attacked by a Roidmude.

Plot
to be added

Cast

 * Shinnosuke Tomari (泊 進ノ介): Ryoma Takeuchi (竹内 涼真)
 * Kiriko Shijima (詩島 霧子): Rio Uchida (内田 理央)
 * Chase (チェイス): Taiko Katono (上遠野 太洸)
 * Go Shijima (詩島 剛): Yuu Inaba (稲葉 友)
 * Jun Honganji (本願寺 純): Tsurutaro Kataoka (片岡 鶴太郎)
 * Rinna Sawagami (沢神 りんな): Rei Yoshii (吉井 怜)
 * Kyu Saijo (西城 究): Kenta Hamano (浜野 謙太)
 * Genpachiro Otta (追田 現八郎): Taira Imata (井俣 太良)
 * Mitsuhide Nira (仁良 光秀): Kisuke Iida (飯田 基祐)
 * Narration (ナレーション), Drive Driver's voice (ドライブドライバーの声): Chris Peppler (クリス・ペプラー)
 * Brain (ブレン): Shota Matsushima (松島 庄汰)
 * Heart (ハート): Tomoya Warabino (蕨野 友也)
 * Medic (メディック): Fumika Baba (馬場ふみか)
 * Roidmude 001 (ロイミュード００１)/"Soichi Makage" (真影 壮一): Masami Horiuchi (堀内 正美)

Guest cast

 * Eisuke Tomari (泊 英介): Tareyanagi (たれやなぎ)
 * Shinnosuke Tomari (teen): Ryohei Aoki (青木 綾平)
 * Yoriko Soma (相馬 頼子): Haneyuri (はねゆり)
 * Ryo Soma (相馬 良): Sota Goto (後藤 崇太)

Shift Cars & Signal Bikes

 * Car Used:
 * Type Change: Shift Formula
 * Tire Exchange:
 * Type Used:
 * Type Formula
 * Bike Used:
 * Mach
 * Form Change: Mach
 * Signal Exchange:
 * Form Used:
 * Mach
 * Chaser
 * Form Change: Chaser
 * Signal Exchange:
 * Form Used:
 * Chaser

Errors

 * to be added