|This article is about a/an webisode in Kamen Rider Build.|
First Chapter (前編 Zenpen) is the first installment of Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~. It features the debut of Build's SmaphoWolf Hazard Form.
Continuity and Placement
This chapter takes place immediately after Sento obtains the Fullbottles from Hokuto and Seito in Episode 21, but one week prior to the scene where Build charges at Grease at the proxy duel.
Nariaki Utsumi appears to help Build prepare for the proxy battle with Grease.
to be added
Kamen Rider Build
|Night Rogue||Nariaki Utsumi|
|Strong Smash Hazard||Hologram|
|Flying Smash Hazard||Hologram|
|Nebula Hell Bros||Unidentified man|
- Sento Kiryu (桐生 戦兎 Kiryū Sento): Atsuhiro Inukai (犬飼 貴丈 Inukai Atsuhiro)
- Misora Isurugi (石動 美空 Isurugi Misora): Kaho Takada (高田 夏帆 Takada Kaho)
- Nariaki Utsumi (内海 成彰 Nariaki Utsumi): Yuki Ochi (越智 友己 Ochi Yūki)
- Build Driver (ビルドドライバー Birudo Doraibā, Voice): KORBY (コービー Kōbī)
- Kamen Rider Build: Seiji Takaiwa (高岩 成二 Takaiwa Seiji)
- Night Rogue: Jun Watanabe (渡辺 淳 Watanabe Jun)
- Strong Smash Hazard: Hajime Kanzaki (神前 元 Kanzaki Hajime)
- Flying Smash Hazard: Jun Watanabe (渡辺 淳 Watanabe Jun)
- Nebula Hell Bros:
- Bottle used:
- Form used:
- PhoenixRobo Form, RoseCopter Form, SmaphoWolf Hazard Form
- When Utsumi is about to transform into Night Rogue, the Transteam Gun says Mist Match before he presses the trigger to transform.
- Closing Screen Fullbottles:
- Kamen Rider: Build
- Biotic: Phoenix
- Abiotic: Robot
- Sento's personality development in Episode 21 was slightly ignored in this special.
- It's unknown how Nariaki received Gentoku's Transteam Gun and Bat Fullbottle.
- Episode 24 suggests that he obtained them from Gentoku after taking him prisoner.