Samaritan High has a notorious reputation as a school overflowing with delinquents. At first glance, students Kawai, Mori, and Tanikura perfectly fit the intimidating image of juvenile troublemakers. However, their feared exteriors completely contradict their inner nature. Contrary to expectations, these three dedicated friends are actually striving to do good deeds around their community. Whether one of them is rescuing a stray chihuahua, another is soothing a crying child, or they are collectively spreading cheer around the neighborhood, these dependable delinquents prove that appearances can be deeply deceiving.

The story is a wholesome slice-of-life comedy set in and around the grounds of Samaritan High. The main trio consists of Kawai, Mori, and Tanikura, whose tough appearances often lead others to misunderstand their helpful intentions. Rather than engaging in fights or truancy, the narrative follows the group as they navigate everyday situations where their bad-boy looks clash with their kind hearts, often leading to humorous and heartwarming misunderstandings. The series focuses on their daily adventures as they secretly or openly assist those in need, becoming unexpected local heroes.

Since the manga is an episodic slice-of-life series, it does not follow a single overarching conflict but instead builds its narrative through a series of short, interconnected incidents. Each chapter typically presents a new scenario where the trio faces a challenge that allows their hidden kindness to shine through. Notable recurring elements include their interactions with local residents who are initially scared of them, the discovery of animals requiring rescue, and the subtle ways they support their classmates. As the series progresses, the gap between their fearsome reputation and their genuinely helpful actions becomes a running joke that endears them further to the community.