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.
And so, to get things under control...
...لذا، للسيطرة على الأمور
Ich wollte damit die Sache
unter Kontrolle bringen.
Intenté solucionarlo y…
Intenté solucionarlo y…
J’ai essayé d’arranger la situation…
E proprio quando la situazione 
sembrava sotto controllo...
E então, para manter
tudo sob controle...
И чтобы взять ситуацию под контроль...