"Jewel BEM Hunter Lime" is a three-episode OVA series that blends elements of fantasy, action, and comedy. The story centers on Lime, a cheerful and energetic young girl who works as a BEM Hunter, tasked with capturing or eliminating supernatural creatures known as BEMs (Bio-Electrical Monsters). These creatures, often dangerous and disruptive, are created from human emotions and negative energy. Lime is accompanied by her two partners, the stoic and serious Goro and the mischievous and playful Milk, forming a trio that balances humor and action.

The narrative unfolds as Lime and her team are sent on missions to deal with various BEMs, each episode presenting a new case. The first episode introduces the team as they investigate a haunted mansion, where they encounter a BEM born from the sorrow of a young girl. The second episode shifts to a high school setting, where a BEM manifests from the jealousy and rivalry among students. The final episode takes a more personal turn, delving into Lime's backstory and her connection to the BEMs, revealing her own origins and the emotional struggles tied to her role as a hunter.

Throughout the series, the dynamic between Lime, Goro, and Milk provides both comedic relief and moments of camaraderie, highlighting their contrasting personalities. Lime's optimism and determination drive the team forward, while Goro's tactical expertise and Milk's playful antics add depth to their interactions. The episodic structure allows for self-contained stories while gradually building on the overarching themes of human emotions, the consequences of negativity, and the moral ambiguity of hunting creatures born from those emotions.

The series balances lighthearted moments with darker undertones, exploring the emotional weight of Lime's mission and the ethical dilemmas surrounding the destruction of BEMs. The narrative does not shy away from addressing the pain and trauma that give rise to these creatures, adding a layer of complexity to the otherwise straightforward action-adventure premise. By the end of the series, Lime's journey as a BEM Hunter is left open-ended, with her resolve to continue her mission despite the challenges and emotional toll it takes.