Wanitokagegisu.

わにとかげぎす

Wanitokagegisu (わにとかげぎす; "Crocodile and Lizard") is a Japanese manga series written and illustrated by Minoru Furuya. It was serialized in Kodansha's seinen manga magazine Weekly Young Magazine from March 2006 to May 2007, with its chapters collected in four tankōbon volumes. A ten-episode television drama adaptation was broadcast from July to September 2017.