Kotoko offers her own explanation of Sumi's death, which awakens the memory of a crime that had slept for decades.
It's probably due to mental fatigue 
on top of dealing with those tumors.
.على الأرجح بسبب الإرهاق الذهني فوق تلك الأورام
Neben den Tumoren liegt es
sicherlich auch an der Resignation.
En plus de sa tumeur,
il a pris un coup au moral.
Credo sia colpa, oltre che del tumore, 
delle sue preoccupazioni interiori.
Deve ser a fatiga mental, além
de lidar com todos os tumores.
К и без того тяжёлой стадии рака
добавился психологический шок.