-cottoncloud-
She was just a sacrificial bride.
Well it wasn't much of a sacrifice.
Karlheinz figured that Yui wouldn't make it on her own, and the church refused to send more girls so he adopted (Y/N). Just a replacement, spare parts, that's all she'll ever be but can se really manage to balance the brother's happiness and Yui's safety or will end up like all the girls before her in this never ending cycle?