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.
who admired Agatha Christie: 
Suzuka-san, Kumi-san, and Rika-san.
:الذين أُعجبوا بأغاسا كريستي
.سوزوكا-سان وكومي-سان وريكا-سان
que admiravam Agatha Christie:
Suzuka-san, Kumi-san e Rika-san.
восхищавшихся Агатой Кристи: 
Судзуки, Куми и Рики.