Kuranaga Haruyuki works for the citizen consultation center at the municipal office of Wani no Kuni. In the three years since his transfer, he has been leading a stressful life and battling stomach pains every day. His diligent, polite, methodical, cowardly and quiet personality gets him sandwiched between his subordinates, vain yet timid boss and the citizens who come with impossible demands and complaints. Kuranaga's only outlet is griping to the tropical arowana fishes that he keeps as he drinks low-malt beer. He eventually erupts one day due to an emergency situation. This awakens his sense of justice and he starts to fight problems in the workplace and his family that leads to a feel-good conclusion.