"Doronpa!" is a supernatural comedy anime set in feudal Japan, blending historical elements with fantastical themes. The story centers on Kapaeru, a mischievous and lecherous kappa, who is exiled from the spirit world for his constant misbehavior. Alongside him is Yukkuru, a naive and kind-hearted snow woman, who is also banished for her inability to scare humans. Together, they are sent to the human world to atone for their mistakes by hunting down evil spirits known as "Youkai."

The duo is joined by Enma Daioh, the stern and powerful ruler of the spirit world, who oversees their mission. Enma assigns them to protect humanity from malevolent Youkai, which often take the form of grotesque and dangerous creatures. Despite their bickering and contrasting personalities, Kapaeru and Yukkuru form an unlikely partnership, using their unique abilities to combat these threats. Kapaeru relies on his cunning and water-based powers, while Yukkuru uses her ice-based abilities, though her timid nature often complicates matters.

As the series progresses, the pair encounters a variety of Youkai, each with distinct motivations and backstories. These encounters often serve as episodic adventures, blending humor, action, and occasional moments of emotional depth. The narrative also explores the dynamics between the spirit world and the human world, highlighting the cultural and moral differences between the two realms. Kapaeru’s irreverent attitude and Yukkuru’s earnestness create a comedic contrast, while their interactions with humans and other spirits add layers to the story.

The series incorporates elements of Japanese folklore, with many characters and creatures inspired by traditional myths and legends. The episodic structure allows for a mix of standalone stories and overarching plotlines, as Kapaeru and Yukkuru gradually grow into their roles as protectors. Despite their initial reluctance and frequent failures, their journey reflects themes of redemption, responsibility, and the complexities of coexistence between humans and spirits. The blend of humor, action, and folklore makes "Doronpa!" a distinctive entry in the supernatural comedy genre.