I was given a god tool [cup] that only produces water, so I decided to live in a barren territory as I like.

Cyan-Birdry, who was supposed to be the successor to the great aristocrats. He was supposed to have a cute fiancée and a smooth sailing life, but he was given only a useless god tool called [a cup that can only put out water] by an adult ceremony, and his engagement with the aristocratic daughter was broken. Cyan was forced out of a barren territory and a vassal corps of only problematic children, and was expelled from a large aristocratic family, but by fulfilling the wishes of a girl he met in that remote area [Cup] ] You will know the true power of. This is a story about a boy who was ridiculed and banished by aristocrats and saved the world by using his useless and ridiculous power.