If you were to judge Mima Takayuki by his looks and competence at work, you would not guess that he makes silly mistakes a lot. His colleagues say that he's "unofficially in charge of soothing" everyone because of that.
but I didn't think it was 
because I was tired.
لكن لم أتوقّع بأنّ السّبب هو لأنّني مُرهَق
ma non pensavo fosse dovuto
alla stanchezza.
mas não acho que
é por estar cansado.