Other Title: 仮面ライダービルド-開幕のベルが鳴る, Kamen Raidā Birudo-Kaimaku no Beru ga Naru
Summary: Due to the settlement of the representative battle, the war will now
end! At least, that’s what everyone thought would happen. The war did
not end, rather, it has gotten much worse. Blood Stalk, who allied
himself with Namba Heavy Industries, is finally starting to set his
plans into motion. Stalk, who had stolen the 10 Fullbottles that were
under Touto’s possession, inserts them into the Pandora Box. All of a
sudden, the Sky Wall begins to move, and a phenomenon beyond belief is
about to unfold before their very eyes…