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

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.
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.

The first manga I've seen break the fourth wall and outright say

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

Oneesama to Watashi: Ojousama ga Isekai Tensei