A small fifth-grader at a private school near Kasumigaseki, Ooi Shiina looks like she is only in third grade and feels self‑conscious about it. For reasons left unexplained, she never brings a lunchbox, so on school days she eats her midday meal at restaurants around the neighborhood. Her choices are startlingly grown‑up: she walks into the kind of no‑nonsense shops that would make a rookie office worker hesitate – a venerable curry house, a no‑frills ramen joint, an old‑school soba shop, a traditional café serving Neapolitan spaghetti, a hard‑core beef bowl outlet. Sometimes she tries to act more adult than she is and ends up in comical failure, but the gap between her youthful appearance and her bold culinary adventures is part of the charm. This is a heart‑warming, lonely‑lunch comic about a girl who longs to be grown‑up, mixing with adults as she savors her solo meals.

The story continues in a second volume with a new protagonist: Kamiu Mai, a fifth‑grade student at the prestigious private Kandagawa Women’s University Elementary School – a true finishing school for young ladies. Mai’s hobbies are browsing old bookstores and eating alone. She too ventures into places ordinary kids would avoid: famous curry shops, half‑chicken ramen joints, time‑honored Western confectioneries, venerable soba restaurants, pure café spaghetti, and connoisseur‑grade gyudon joints. But there is a secret behind her solitary dining – a personal reason that adds depth to her everyday explorations. Each chapter follows Mai as she discovers yet another hidden‑gem eatery, and the reader gradually learns what drives her to keep her meals to herself. The series, with its gentle humor and warmth, celebrates the quiet joy of discovering good food on one’s own terms in the vibrant neighborhoods of Jinbocho and Akihabara.