The moment the culture festival reached its finale, the jewel object made by Shirogane was stolen by a phantom thief who calls himself Arsène. Kaguya and the others headed to the roof where the phantom thief keeps appearing, but there was no one there. Fujiwara, who transformed into a genius detective, struggles to solve the mystery behind the calling card and uncover the thief's true identity. But Kaguya, left behind at the scene of the crime, had begun to figure out the criminal. The problem is the location. Kaguya traced the phantom thief's line of thinking and headed to where he is now...
What we should've thought was that it was
something to be used for an obvious reason.
.ما كان علينا أن نفكّر فيه هو أنّها شيء سيُستَعمل لسبب واضح
Es gab einen banaleren, viel eher auf
der Hand liegenden Grund, es zu verwenden.
Debería usarse por un motivo lógico.
Debería usarse por un motivo lógico.
Il a été utilisé
pour une raison plus évidente.
Secondo me
Deve ser usado por uma razão lógica.
Её могли использовать 
из прагматических соображений.