"Bokutachi wa Tenshi Dakara Kamisama o Shinjiteru" is a manga series that explores themes of faith, identity, and the supernatural within the framework of a high school setting. The story centers on a group of students who attend a religious academy, where they are trained to become "angels" tasked with protecting the world from malevolent forces. The narrative delves into the lives of these students as they navigate their roles, personal struggles, and the moral complexities of their duties.

The protagonist, a young student named Hoshino, is initially skeptical of the academy's teachings and the existence of divine beings. However, after encountering a mysterious girl named Sora, who claims to be an angel, Hoshino's perspective begins to shift. Sora's presence introduces a series of supernatural events that challenge the students' understanding of their roles and the nature of their faith. As the story progresses, Hoshino and his peers are drawn into a conflict involving dark entities that threaten both the academy and the world beyond.

The plot intertwines personal growth with larger philosophical questions about belief, duty, and the nature of good and evil. The characters are developed through their interactions and the challenges they face, with each student grappling with their own doubts and convictions. The academy itself serves as a microcosm of the broader world, reflecting the tensions between tradition and modernity, faith and skepticism.

Key characters include Hoshino, whose journey from doubt to belief forms the emotional core of the story; Sora, whose enigmatic nature and connection to the divine drive much of the plot; and a supporting cast of classmates and mentors who each contribute to the unfolding narrative. The series balances action and introspection, with battles against supernatural threats punctuated by moments of quiet reflection and character development.

Overall, "Bokutachi wa Tenshi Dakara Kamisama o Shinjiteru" presents a layered narrative that combines elements of fantasy, drama, and philosophical inquiry, set against the backdrop of a religious academy where the boundaries between the mundane and the divine are constantly tested.