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...
We were sitting in the back, you see, 
and couldn't help overhearing.
كنّا نجلس في الخلف ولم يسعني
إلّا أن أسمع حديثكم
Ich saß zwar hinten,
aber habe zufällig alles mitangehört.
Estaba sentado al fondo,
pero no pude evitar oírlos.
Estaba sentado al fondo,
pero no pude evitar oíros.
Nous avons entendu votre discussion
par inadvertance depuis notre table…
Be', eravamo seduti lì dietro
Estávamos sentados nos
fundos e acabamos ouvindo.
Мы сидим за вами и, 
так получилось, всё слышали.