"Otonari Little Witch" centers on the life of a young witch named Lilia, who moves into a quiet suburban neighborhood to live a normal life while hiding her magical abilities. Lilia’s goal is to blend in with humans, but her lack of familiarity with modern human society often leads to comedic and heartwarming misunderstandings. Her next-door neighbor, a high school student named Haruto, becomes an integral part of her life as he helps her navigate the complexities of everyday human interactions.

The narrative explores Lilia’s attempts to master mundane tasks, such as using household appliances, attending school, and forming friendships, all while concealing her magical identity. Despite her efforts, her magical nature occasionally surfaces, creating situations that challenge her secrecy. Haruto, initially skeptical of her eccentric behavior, gradually becomes her confidant and support system, often finding himself caught up in her magical mishaps.

The story balances slice-of-life elements with light fantasy, focusing on the growing bond between Lilia and Haruto. Their relationship evolves from curiosity and skepticism to genuine care and mutual understanding. The manga also introduces other characters, including fellow witches and magical beings, who add depth to the world-building and occasionally complicate Lilia’s attempts at a normal life.

Themes of friendship, self-discovery, and the clash between magical and human worlds are central to the narrative. Lilia’s journey is marked by her determination to adapt to her new environment while staying true to her magical heritage. The series maintains a lighthearted tone, with moments of humor and warmth, as it portrays the challenges and joys of bridging two vastly different worlds.