Onee-sama to Watashi: Ojou-sama ga Isekai Tensei

Synopsis:

Hinako is a reincarnated being from another world. Because she and the giant Eiris became sisters because they share the same goal, she was dubbed "the smallest giant." to locate their relatives. Hinako looks for Eiris' siblings and her sister, who might also have been reincarnated. However, while she is dealing with a specific request, a churchgoer catches her eye and forces her to take a chance. In this otherworldly fantasy of reincarnation that unites them, a story about a young girl and a giant, two people of different race and birth, searching for their "loved ones."