仮面ライダースナイプ・花家大我にガシャットを奪われ、仮面ライダーに変身できなくなった永夢。このままではゲーム病の患者を治すことができない……、と落ち込む永夢の前に現れたのは監察医の九条貴利矢だった。奪われたガシャットを取り返す代わりに、天才ゲーマーである永夢の腕を見込んであることをお願いしたいというのだが―――。
Emu cannot transform into a Kamen Rider since Taiga stole his Gashat. Medical Examiner Kiriya Kujo appears before a crestfallen Emu. He brings a Bugster-infected patient and offers to steal back Emu's Gashat in exchange of helping Kujo out with his prodigious gaming abilities.
Kiriya appears before Taiga and transforms into Kamen Rider Lazer. He challenges Taiga to a racing match with Mighty Action X as the prize. Lazer separates the Motors Bugster from the patient, snatches the Gashat from Taiga, and returns it to Emu.
Lazer Levels Up to Level 2, which is a bike! Emu gets on and both chase after the Bugster.
