Inagaki Chuta is an elementary school student. He gets nervous easily in front of people. At his grandfather's funeral, Chuta witnesses his father become nervous while making a speech as the chief mourner. Afterwards, Chuta worries about becoming the chief mourner at his parents' funeral. Meanwhile, Chuta has an aunt, Kyoko, and uncle, Shuji, who are both single. Chuta begins to worry that he may become the chief mourner at their funerals as well since they are both single. Chuta struggles to find marriage partners for his aunt and uncle.