Soel and Larg: The Adventures of Mokona Minuta is a picture book illustrating the first year of the lives of Soel and Larg, two rabbit-shaped children with a big future ahead of them. They learn many lessons about themselves, others, and the world around them from their creators, a gentle-hearted magician named Clow and a high-spirited witch named Yuuko. As they spend each season of the year with each other, Soel and Larg help Clow and Yuuko come to some emotional epiphanies of their own.

The story takes place in Tokyo sometime between the 1960s and the early 1970s, with some scenes set in the nearby suburb of Tomoeda.