Other Title: 仮面ライダービルド-(疑惑のレガシー, Kamen Raidā Birudo-Giwaku no Regashī
Summary: Sento’s father, Shinobu Katsuragi, is alive and is working alongside
Evolto! This kind of information is starting to greatly worry the Build
team. It seems that Shinobu’s mission is to collect all of the Lost
Bottles and add them to the black Pandora Panel. There is even the
possibility that Shinobu could be the one who is really pulling the
strings. Regardless, Sento believes in the righteous purpose of the
system that his father developed, the Rider System. But just then,
another Build appears before Sento.