大貴族の後継ぎになるはずだったシアン＝バードライ。 かわいい婚約者も出来て順風満帆の人生のはずだった彼だが、成人の儀で【水しか出せないコップ】という役立たずな神具しか与えられず、貴族令嬢との婚約も破談。 不毛の地である領地と、問題児ばかりの家臣団を押し付けられ、追放同然に大貴族家を追い出されたシアンであったが、その辺境の地で出会った少女の願いを叶えた事で【コップ】の真の力を知ることになる。 これは貴族たちからバカにされ、追放された少年が役立たずと馬鹿にされた力を使って世界を救う物語である。 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.
