"A Very Fairy Apartment" centers around Yuta Asahina, a young man who moves to Tokyo to attend university. Struggling to find affordable housing, he stumbles upon an unusually cheap apartment in a seemingly ordinary building. Upon moving in, Yuta discovers that the apartment is inhabited by a variety of supernatural beings, including fairies, spirits, and other mythical creatures. These entities coexist with humans in a hidden, magical ecosystem within the building, which serves as a sanctuary for them.

The narrative explores Yuta’s adjustment to his new life as he becomes the caretaker of the apartment and its supernatural residents. Among the key characters is Lily, a fairy who becomes Yuta’s primary guide to the magical world. Other notable residents include a mischievous water spirit, a shy ghost, and a protective tree spirit, each contributing to the apartment’s vibrant and chaotic atmosphere. Yuta’s role evolves from a mere tenant to a mediator between the human and supernatural worlds, often resolving conflicts and ensuring harmony within the building.

The plot intertwines slice-of-life elements with light fantasy, focusing on Yuta’s daily interactions with the apartment’s inhabitants and his growing understanding of their needs and quirks. As the story progresses, deeper mysteries about the apartment’s origins and the true nature of its residents are gradually revealed. Yuta’s relationships with the supernatural beings deepen, and he begins to uncover his own connection to the magical world, hinting at a larger destiny tied to the apartment.

Themes of coexistence, responsibility, and the blending of mundane and magical realities are central to the narrative. The series balances humor, warmth, and occasional tension, creating a whimsical yet grounded portrayal of a world where the ordinary and extraordinary intersect. Through Yuta’s experiences, the story highlights the importance of empathy and adaptability in navigating unfamiliar environments and relationships.