"Ebiten: Ebisugawa Public High School's Tenmonbu" is a comedic anime series centered around the eccentric members of the Astronomy Club at Ebisugawa Public High School. The club, officially known as the Tenmonbu, is a small and peculiar group of students who spend their time engaging in bizarre activities rather than actual astronomy. The club’s president, Itsuki Ohsawa, is a self-proclaimed genius who often devises strange experiments and schemes, while her best friend, Kyouko Toshinou, is a lazy and apathetic member who frequently clashes with Itsuki’s over-the-top enthusiasm.

The series introduces a new member, Noya Itsuki, a transfer student who is mistaken for a boy due to her short hair and androgynous appearance. Noya quickly becomes the target of Itsuki’s relentless attempts to recruit her into the club, despite her initial reluctance. The club’s other members include Izumiko Ohsawa, Itsuki’s younger sister, who is obsessed with creating her own manga, and Touka Toudou, a quiet and mysterious girl with a penchant for occult practices. Together, the group navigates a series of absurd and surreal situations, often involving misunderstandings, slapstick humor, and parodies of popular anime tropes.

The narrative is episodic, with each episode focusing on the club’s antics and interactions, often leading to chaotic and unpredictable outcomes. The humor is heavily reliant on exaggerated character traits, absurd scenarios, and meta-references to otaku culture. Despite the lack of a central overarching plot, the series maintains a lighthearted and fast-paced tone, with a focus on the quirky dynamics between the characters. The show’s comedic style is rooted in its over-the-top characterizations and the contrast between the club members’ personalities, creating a series of humorous and often nonsensical situations.