Hinako, is one reincarnated from another world, she was called "the smallest giant" after she and the giant Eiris were united as sisters because they have the same goal; to find their family. Hinako searches for her sister, who could also have been reincarnated, and Eiris' siblings. However, in resolving a certain request, a gentleman from a church catches her eye, and is forced to take a risk. A story about a young girl and a giant, two people of different race and birth, searching for their "loved ones", begins in this otherworldly fantasy of reincarnation that unites them.