Boku Ra No Theme Park Kessen (Kadokawa Tsubasa Bunko)

[Machine Translation] Kobayashi, a transfer student, tells them that there is a theme park in Fukushima Prefecture that is only open to children. When Eiji and his friends go there, they find a realistic-looking dinosaur, a huge maze, and a transparent galactic express...a wonderland just for children! However, some adults who want to make money come in and take over the park...? A great battle between us and the bad adults! Newly written by Tsubasa Bunko, the 13th installment of the Bokura series! From elementary school upper grade.

転校生の小林は、福島県に子どもしか入れないテーマパークがあると言う。英治たちが行ってみると、本物そっくりの恐竜や巨大迷路、透明な銀河特急など、まさにここは、子どもだけのワンダーランド!ところが、金もうけをたくらむ大人たちが乗っとろうと侵入してきて...!?ぼくらと悪い大人との大決戦!つばさ文庫書きおろし、ぼくらシリーズ第13弾!!小学上級から。