Gu Ze, the notorious troublemaker of the school, was initially assigned a 30-day class duty, but Ye Ruchuan, the student union vice president, altered it to last for 300 days. This led to a battle of wits between the two, as they fought over whether to comply with the duty or not. However, amidst the ruthless manipulation, Gu Ze and Ye Ruchuan started to form a bond and gain insights into each other's character. This was an unexpected development, considering their initial disdain for one another as delinquent versus vice president. The story follows the daily life of a 17-year-old determined to evade class duty at all costs.