Imoriya Mato just wants to live a quiet life at school, but she's also competitive by nature. Her friend, Kouda-chan, asks her to represent their class in the competition for the right to use the rooftop at the school festival, known as the "Fool's Smoke Game." She gets caught up in a series of unusual challenges...? Deception and logic lead to victory - the ultimate battle of wits where no one dies!