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.
Rika-san began to feel blackmailed,
،بدأت تشعر ريكا-سان بالابتزاز
plagte Rika die Zwangsvorstellung,
für immer ihre Sklavin sein zu müssen.
Rika est devenue paranoïaque
quant au fait de devenir
Rika-san deve aver pensato 
di essere vostra schiava a vita.
a Rika-san começou a se
sentir chantageada,
Рика стала жертвой вымогательства,