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...
"Claiming the culture festival"
is such a cryptic message.
.الظّفر بالمهرجان الثقافي" رسالة مشفرة للغاية"
Aber was er damit meint, das Fest
von uns zu stehlen, verstehe ich nicht.
Qu’entend-il par « voler le festival » ?
C’est trop mystérieux.
Non capisco neanche il senso
 di questo "ruberò il festival culturale".
Também não faz sentido dizer que vai
tomar o festival. É tudo um mistério.