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.
Souma is worried about his older brother because when he's focused on work, he neglects food and sleep. After discussing it with his friends, Souma decides to make a bento lunch for his brother.