A caiman is an alligatorid crocodilian belonging to the subfamily Caimaninae, one of two primary lineages within Alligatoridae, the other being alligators.
Based on an adventure mature seinen manga series written and illustrated by Q Hayashida. It was serialized in Shogakukan's manga magazines Monthly Ikki (November 2000 to September 2014), Hibana (March 2015 to August 2017), and Monthly Shounen Sunday (November 2017 to September 2018); its chapters were collected in 23 tankobon volumes.