"Brothers Conflict" centers on Ema Hinata, a teenage girl whose life takes an unexpected turn when her father remarries, leading her to move into a luxurious mansion shared by her 13 new stepbrothers. The series explores the dynamics of this unconventional family setup, blending elements of romance, comedy, and drama. Ema, an animal lover, brings her pet squirrel, Juli, into the household, adding a whimsical touch to the narrative.

The stepbrothers, each with distinct personalities and professions, range from a doctor and a novelist to a pop idol and a high school student. Their interactions with Ema vary, with some forming close bonds and others exhibiting romantic interest, creating a web of tension and affection. The story delves into their individual relationships with Ema, highlighting the challenges of adjusting to a blended family while navigating the complexities of sibling and romantic feelings.

As Ema settles into her new life, she becomes the focal point of the brothers' attention, leading to moments of jealousy, rivalry, and heartfelt connections. The series balances lighthearted humor with emotional depth, exploring themes of family, love, and personal growth. The brothers' diverse backgrounds and aspirations add layers to the narrative, offering a multifaceted look at their lives and how Ema's presence influences them.

The plot progresses through episodic arcs that focus on different brothers, providing insight into their personalities and relationships with Ema. While the romantic undertones are a central element, the series also emphasizes the importance of familial bonds and mutual support. The interactions between Ema and her stepbrothers drive the story forward, creating a mix of heartwarming and dramatic moments that define the series.