Jirai Glico

Mabuto Sagoriya just wants to live a quiet life at school, but she's also competitive by nature. Her friend, Minoda-chan, asks her to represent their class in the competition for the right to use the rooftop at the school festival, known as the “Fugen 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!

(Source: Young Animal, translated)