Kyousuke has been arrested. Hagiwara Sakutarou, Nomura Kodou, and the others gather at the "milk hall," a small cafe serving European beverages and foods, to try to discover the truth of the situation. Each of the literary men unveil their deductions. Natsume Souseki introduces Akutagawa Ryuunosuke who also participates in the puzzle solving, but none of them come up with a deciding theory. As they ponder, a boy named Hirai Tarou steps forward. Hirai tells them that everything started two nights ago...
If a right-handed person had used that 
short sword, with Otaki facing her attacker,
لو استخدمَ شخصٌ أيمن ذاك السّيف القصير
،بينما وجه أوتاكي نحوه
Wenn ein Rechtshänder den Dolch benutzt, hätte er sie
natürlich auf der linken Seite ihres Halses verletzt.
Perché se chi ha brandito il pugnale fosse stato destrimano,
Se uma pessoa destra usasse uma
adaga, com a O-Taki olhando o agressor,
Если бы правша с таким ножом
 напал на О-Таки спереди,