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.
The people who were present 
the day of the incident:
:الأشخاص الذين كانوا حاضرين يوم الحادثة
Am Tag der Tat waren am Tatort:
Suzuka-san y Kumi-san
estaban allí el día que sucedió.
Suzuka-san y Kumi-san
estaban allí el día que sucedió.
Selon elle,
parmi celles présentes ce jour-là,
Le persone presenti sul luogo
 dell'incidente, quel giorno,
As pessoas presentes no
dia do incidente eram...
В день, когда всё случилось, она