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?
So what if you're a professor 
at an imperial university.
ماذا لو كنتَ أستاذاً في جامعة إمبراطوريّة؟
Kaum zu glauben, dass jemand
wie du überhaupt rumläuft.
¿De verdad eres profesor
en la universidad imperial?
¿De verdad eres profesor
en la universidad imperial?
Et vous êtes de l’université impériale,
quelle blague !
Sono stupefatta di sentire che sei un professore
laureato in un'università imperiale.
E daí que você é professor
numa universidade imperial?
И что с того, что ты профессор
 в императорском университете.