Ema Hinata moves into the Sunrise Residence after her father remarries Miwa Asahina, discovering she now has thirteen stepbrothers. Though she hopes for a peaceful family life, the sudden presence of a young woman in an all‑male household stirs romantic tension and jealousy among the brothers, each of whom begins to develop feelings for her. Brothers Conflict 13Bros.Collection is a manga that adapts various drama CD tracks from the broader Brothers Conflict franchise. Rather than following a single continuous storyline, the collection presents standalone vignettes that spotlight different sibling relationships, comedic mishaps, and romantic developments. Each chapter focuses on a particular brother or pair of brothers, exploring how they interact with Ema in scenarios that range from everyday life to more intimate, flirtatious encounters. The thirteen brothers span a wide age range and diverse professions—from a pediatrician and a game developer to a monk and a musician—which gives each chapter a distinct tone and dynamic. The setting remains the shared mansion, where the brothers’ conflicting personalities and competing affections create a lively, often chaotic household. The narrative arcs are episodic, drawing from the light novels, otome game scenarios, and audio dramas, and they highlight the central conflict: Ema’s desire for a harmonious family versus the brothers’ growing romantic rivalry.