Why Were the Families Targeted?

Why Were the Families Targeted (なぜ家族は狙われたのか) is the twenty-eighth episode of Kamen Rider Drive.

Synopsis
Go turned out to be the son of Professor Banno, the inventor of the Roidmudes. This fact was not known by Kiriko, of course. Shinnosuke, now knowing the reason behind Go’s particular animosity against the Roidmudes, is left speechless.

As for the ongoing case of the residential complex victims, it is now theorized that the ultimate target could have been Go all along. Could Go’s refusal to accept Chase come not from him becoming a Kamen Rider but because of his Roidmude condition? Shinnosuke has promised Kiriko that he’ll rescue Go no matter what.

However, the disciplinary restriction Nira placed on him prevents transforming into Drive. Chase, who has appeared to prevent further problems at Shinnosuke’s request, is the target of Go’s wrath once more.

Plot
Continuing from previous episode, Go can't still forgive the mistakes his father had made, even if it's turned out to be an accident. His wish is to destroy all Roidmudes before Kiriko would found out. At the Drive Pit, while Shinnosuke and Mr. Belt discuss the matters, Kiriko enters and reveals the Shift Speed Prototype Car in repair.

At the Special Investigation Unit's office, Shinnosuke deduced that the Roidmude's goal is to find a perfect candidate to fuse with and all rejected victims are currently in suspended animation. Strangely enough, Rinna was the only one remained unaffected. Mitsuhide Nira visits the office again, gleefully mocking over the team's ineffective ever since Shinnosuke was suspended before leaving. An idea hits Shinnosuke, where he and Kiriko visits Chase as they asks him for his help. While Chase agrees as a gift for saving him, he notes that Go's hatred for him earlier was unusual compared to before in addition with Seeker having anticipated/planned Go's ascending hatred so much that he wants to fight Chase. Kiriko tries to call Go but to no avail as he focuses in his client's help. Yoriko suddenly receives a call from Ryo, with his voice is shrouded but knows where the exact location he is as they rush there.

The Unit now knows that Go is the main target of Seeker Roidmude, while Jun speculates a greater force (presumably 001) is behind this threat. As 001 and Brain decide to launch the biggest move of all, Go and Yoriko arrives at an apartment area to search Ryo, where the whole residents descent into madness. Back at the Unit's office, Kyu reveals that Yoriko was never mentioned in one of Ryo's relatives. However, he manages to find the data about Ryo in his working area. Rinna enters and has upgraded the Heavy Acceleration detector to detect the smallest particle in a larger radius, even from the sky with same upgrades had been fitted to the Ride Booster Set.

What's left was for Shinnosuke's liberation, where Proto-Zero rampages in the Unit's office when Nira makes another visit, forcing him to lift the ban on Shinnosuke's transformation as Drive. Proto-Zero and Drive goes out of the office, where Tridoron awaits as the Ride Booster Set fuses with Tridoron and Drive and Chaser aboard. Brain witness their depart, sending three Giant Bat Roidmudes to attack the Riders, with Drive and Chaser eliminate them before resuming their journey. After eliminating the Neo Viral Cores and knocking out the victims, Mach finds Ryo and awakes him but surprised when learns that Yoriko is not her sister.

Yoriko appears and reveals that she only uses Go's family relationship to target the population by spreading the madness infection that would cause them to go berserk, spreading through touch with Go affected as well. While 050/"Yoriko"'s plan indeed is to search for ideal hosts for the Neo Viral Cores, but the other plan they constructed is to draw his inner darkness. "Yoriko" as Seeker willingly had herself injured by Mach in order to escalate his anger until Chaser tried to stop him from his rage that would ended up killing "Yoriko", but eventually gets himself retaliated by Mach until Drive comes in and knocks Mach. Enraged by Drive's interference, Seeker tried to attack him, but overpowered by Type Formula and get separated, splitting into "Yoriko" and 050. In the end, Drive Type Formula Mantarn finishes 050 with Trailer Impact.

After the battle, Shinnosuke reveals that "Yoriko" is Reiko Nishihori, the daughter of Koya Nishihori, 005's host, whom Chase destroyed during his time as Protodrive with Shinnosuke at that same time arrested Koya for attempted robbery and murder. Reiko was never Ryo's sister, but she was one of his customers. Reiko's reason for committing such act is not to avenge her dad, but to make him commit the greatest crime from her death in the hands of Mach. Go quickly compare his situation to Reiko in his mind, having their fathers turned them into what they become now.

At the hospital, Seeker's suspended animation effect on Genpachiro has worn off, with Rinna visits him and grew flirtatious after their earlier act as husband-wife pair in one of their undercovers. Meeting the Roidmudes Heart and Medic, they amaze 001 for handing over his power to Roidmude 050 (the ability to induce madness in a population) with 001 decides to make use of Go Shijima/Kamen Rider Mach as their ultimate weapon. At night, while Go is wandering around with suffering hallucinations of Shinnosuke, Kiriko and Banno, Brain appears out of nowhere and approaches him.

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

 * Roidmude 050 (ロイミュード０５０): Kiyohito Yoshikai (吉開 清人)
 * Kiriko Shijima (teen): Yui Kato (加藤 結)
 * Go Shijima (Child): Ryu Hashizume (橋爪 龍)
 * Reiko Nishihori (西堀 令子)/Seeker Roidmude: Haneyuri (はねゆり)
 * Ryo Soma (相馬 良): Sota Goto (後藤 崇太)
 * Civilians: Raiki Komino (小美野 来希), Ryota Ashidachi (足立 りょう太), Ai Tanaka (田中 あい)

Shift Cars & Signal Bikes

 * Car Used:
 * Type Change: Shift Speed, Shift Formula
 * Tire Exchange: Rumble Dump (w/ Deadheat Mach), Mantarn F01, Jacky F02 (in Trailer-Hou), Sparner F03 (in Trailer-Hou)
 * Type Used:
 * Type Speed, Type Formula, Type Formula Mantarn
 * Bike Used:
 * Mach
 * Form Change: Signal Mach, Shift Dead Heat
 * Signal Exchange: Signal Tomarle
 * Tire Exchange: Arabull (w/ Deadheat Mach)
 * Form Used:
 * Mach, Mach Tomarle, Deadheat Mach
 * Chaser
 * Form Change: Chaser
 * Signal Exchange: N/A
 * Form Used:
 * Chaser