Recorder to Randoseru

Atsushi Miyagawa may look like a grown man, but he is still an elementary school boy whose appearance keeps landing him in awkward situations. Sayo tries to teach him to swim, while a visit to his neighbor Take at work leads to another misunderstanding: Atsushi is mistaken for someone old enough to work as a bartender. From the pool to an unexpected job, looking mature proves very different from being ready for adult responsibilities.