It was serialized in Shogakukan's seinen manga magazine Big Comic Superior from December 2013 to January 2018, with its chapters collected in six tankōbon volumes.

With his allowance cut off, unable to find a job or pay rent, Uehara is forced to return to his home island of Yonase, Okinawa.

As Uehara, who has a communication disorder, wanders the island, he runs into people from his childhood, including Shinjou Kanako, his first love.

Uehara's body splits apart, and after he is reconstituted, he finds that his penis has been replaced with a large appendage and that he cannot control his lust towards women.

Written and illustrated by Daisaku Tsuru, Mushinuyun was serialized in Shogakukan's seinen manga magazine Big Comic Superior from December 13, 2013,[2] to January 12, 2018.