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 left-handed person were 
to stab themselves in the throat,
إذا أراد شخصٌ أعسر أن يطعنَ
،نفسه في العنق
Wenn sich ein Linkshänder
in den eigenen Hals stechen will,
Si alguien zurdo se apuñala el cuello,
Si alguien zurdo se apuñala el cuello,
Si un gaucher désirait se poignarder,
Se una persona mancina
Se uma pessoa canhota
se apunhalar na garganta,
Если левша решит 
ударить себя в горло,