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.
Kana-san mentioned
 they had a personal quarrel,
،ذكرت كانا-سان أنّ بينهما خلاف شخصيّ
Kana sprach von einem persönlichen Streit,
deshalb vermute ich die Ehe dahinter.
Kana-san dijo que tenían
problemas personales.
Kana-san dijo que tenían
problemas personales.
Kana a évoqué des conflits
sans doute causés par son mariage.
Kara-san ha parlato di screzi 
per questioni personali,
A Kana-san mencionou uma briga pessoal,
Кана упомянула об их разногласиях,