On Valentine's Day, popular mystery author Aigasa Kurisu invites Kiyotaka and Aoi to the Shinkokan at the Yoshida-Sanso. But instead of an innocent book reading, they find a group of suspects and a mystery to be solved.
Then, before I unravel events 
around the incident,
،إذًا، قبل أن أكشف أحداث الحادثة
Bevor ich den Vorfall entschlüssle, …
Antes de desenmarañar este caso,
Antes de desenmarañar este caso,
Avant que je résolve l’affaire,
Prima di parlare della soluzione del caso,
Então, antes de eu revelar
os eventos do incidente,
В таком случае, могу я сначала