A boy with a unique skill [Luggage Carry] that can carry a large amount of items.He was forced to work as a choreographer for the S-rank party, "The Black Lion of the Clairvoyant".While spending such a daily life, the party succeeded in obtaining a more convenient storage item than the rucksack skill.Unnecessary backpack is banished in a dangerous dungeon.He was in a desperate situation, but he met a shrine maiden girl, Mio, who suddenly appeared...?