Recorder to Randoseru

Miyagawa Atsushi is an 11-year-old boy who stands 180 centimeters tall and has a mature build, which often leads to misunderstandings and trouble. In contrast, his 17-year-old sister Atsumi is only 137 centimeters tall with a childish appearance. Despite the age difference, Atsumi takes care of her younger brother, who acts his true age.

This four-panel manga follows the daily lives of the siblings as they navigate the comedic situations caused by their reversed appearances. Atsushi's grown-up look leads to him being mistaken for an adult, while Atsumi's youthful appearance causes her to be treated like a child. Together, they face the challenges and humor that arise from their unusual dynamic.