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...
The two of you are both the murderers 
and not the murderers.
كِلاكما قاتِلان أو لستُما قاتلين
Ihr beide seid die Mörder
und wiederum nicht die Mörder.
Ambos son el asesino
y a la vez no lo son.
Ambos son el asesino
y a la vez no lo son.
Vous deux êtes à la fois
coupables et non-coupables,
Voi due siete e non siete i colpevoli...
Vocês dois são e não são os assassinos.
Вы оба убийцы 
и не убийцы в то же время.