Isekai no Toilet de Dai wo Suru.  

Taking a Crap in a Fantasy World Toilet, 異世界のトイレで大をする。

In this manga story, we follow a young boy who gets sent to an imaginary world where he embarks on exciting journeys. During one of these excursions with his companions in a specific dungeon, the protagonist feels the urge to use the restroom and is directed by their party members to what they believe is a divine toilet.

Isekai no Toilet de Dai wo Suru. has been published in English as Dungeon Toilet by Seven Seas Entertainment since May 21, 2021.