is a Japanese manga series written and illustrated by . It was serialized in Kodansha's manga magazine Morning from June 2017 to June 2019, with its chapters collected in ten volumes. A ten-episode television drama adaptation was broadcast on TBS from January to March 2020.
Written and illustrated by , Ship of Theseus was serialized in Kodansha's manga magazine Morning from June 22, 2017, to June 27, 2019. Kodansha collected its chapters in ten volumes, released from September 22, 2017, to December 23, 2019.
In August 2024, Kodansha began publishing the series in English on its K Manga digital service.
A ten-episode television drama adaptation was broadcast on TBS from January 19 to March 22, 2020. Uru performed the series' theme song .
The series' fourth volume was nominated for the 47th Angoulême International Comics Festival in the Best Comic category in 2019, and the tenth volume was nominated for the 49th edition in 2021.