A coming-of-age drama story, it follows the life of a child named Onodera Punpun, from his elementary school years to his early 20s, as he copes with his dysfunctional family, love life, friends, life goals and hyperactive mind, while occasionally focusing on the lives and struggles of his schoolmates and family. Punpun and the members of his family are normal humans, but are depicted to the reader in the form of crudely drawn birds. The manga explores themes such as depression, love, trauma, social isolation, death, and family.