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?
If you abstained from frequenting brothels,
،إذا امتنعتَ عن التردّد على بيوتِ الدّعارة
Würden deine Sorgen
nicht sofort verschwinden,
Tes soucis disparaîtraient aussitôt,
Se evitassi di frequentare bordelli,
Se você parasse de frequentar bordéis,
Обходи ты 
публичные дома стороной,