Other Title: 仮面ライダービルド-兵器のヒーロー, Kamen Raidā Birudo-Heiki no Hīro
Summary: Gentoku’s words brought doubt to Sento’s ears! The fact that Sento is
actually the demonic scientist himself has really brought him down. He
keeps repeating to himself that he was the one who experimented on
humans and created the monsters called Smash. Sento starts to fill with
guilt. However, Ryuga speaks his mind. He knows he cannot continue to
fight alongside him if he knows he was the scientist behind the
technology that killed his girlfriend. Ryuga summons Sento to him by
saying… “Fight me”…