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?
I must have known... but I wanted
 to believe it wasn't true...
...كنتُ أعلم... لكن أردتُ عدم تصديق ذلك
Ich muss es bemerkt haben …
En realidad ya debía saberlo.
Pero no quería admitirlo.
En realidad ya debía saberlo.
Pero no quería admitirlo.
Je l’avais sans doute compris avant…
Io lo sapevo...
Eu devia saber, mas não queria
acreditar que era verdade...
Я должен был понять... 
Но не хотел в это поверить...