A prostitute from Hananoya, O-Taki, has been killed. When Takuboku says, "I saw Kyousuke in O-Taki's room," Kyousuke becomes a prime suspect. Meanwhile, based on the fact that Takuboku's romaji diary was left in O-Taki's room, Kyousuke begins to suspect that Takuboku might have done it. Where does the truth really lie?
He must have gauged when 
I might leave and then killed her!
!لا بدَّ وأنّه راقب حتّى أغادر ثمّ قتلها
Er muss mich abgepasst haben,
als ich raus bin und sie …
Debió atacarla cuando vio que me iba.
Debió atacarla cuando vio que me iba.
Il a dû attendre mon départ
pour la tuer !
È stato lui che,
calcolando il momento in cui ho lasciato la stanza,
Ele deve ter esperado
que eu saísse e a matou!
Должно быть, он дождался, 
пока я уйду, и убил её!