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.
But as Rika-san grew financially well-off
لكن مع تحسّن وضع ريكا-سان الماديّ
Aber als es Rika plötzlich
finanziell sehr gut ging,
Pero Rika-san empezó a ganar dinero
Pero Rika-san empezó a ganar dinero
Hélas,
Rika s’est enrichie financièrement,
Tuttavia, Rika-san ha cominciato 
a guadagnare molto bene
Mas quando a Rika-san começou
a ganhar muito dinheiro
Но когда Рика начала 
хорошо зарабатывать,