Both Sin and Impurity - The 10 Seconds Decision (罪もけがれも THE 10 SECONDS DECISION Tsumi mo Kegare mo THE 10 SECONDS DECISION?) is the 19th episode of Twin Star Exorcists.
It's all been leading up to this. With their new Resonance abilities, the Twin Star Exorcists take the fight directly to Ijika Yuto. Will it be enough to defeat the twisted, evil exorcist?