"Everyday is Sunday" is a slice-of-life manga that centers on the daily lives of a group of individuals living in a small, quiet town. The narrative unfolds through a series of interconnected vignettes, each focusing on different characters and their mundane yet meaningful experiences. The town itself serves as a central character, with its serene atmosphere and close-knit community providing the backdrop for the stories.

The main characters include a young woman named Aya, who works at a local café and dreams of becoming a writer; her childhood friend, Hiroshi, a reserved and thoughtful mechanic; and an elderly shopkeeper, Mr. Tanaka, who has lived in the town his entire life and serves as a mentor figure to many. Other notable characters include a high school student, Yuki, who struggles with balancing her studies and part-time job, and a wandering artist, Riku, who finds inspiration in the town's simplicity.

The plot does not follow a traditional linear structure but instead weaves together the characters' lives through their interactions and shared moments. Aya's journey to find her voice as a writer is a recurring theme, as she draws inspiration from the people and events around her. Hiroshi's quiet dedication to his work and his unspoken feelings for Aya add a layer of subtle tension. Mr. Tanaka's stories about the town's history and his wisdom provide a sense of continuity and depth to the narrative.

The manga explores themes of community, personal growth, and the beauty of everyday life. The characters' struggles and triumphs are portrayed with a gentle realism, emphasizing the importance of small moments and connections. The pacing is deliberate, allowing readers to immerse themselves in the town's rhythm and the characters' lives. Through its episodic structure, "Everyday is Sunday" captures the essence of human experience, highlighting the quiet joys and challenges of ordinary life.