She's lookin' very kawaii! Though on the remark of there being an older brother, get over it people, she already has a younger sister so there will be doujins of incest amongst them. We cannot stop that.
But on the brother thing. Couldn't you make him the middle child? Since Kako is suppose to be the past, marking her as the youngest, and Mirai being the eldest, making her the future, shouldn't the brother be in the middle? making him the present? I don't know, just my two cents. (
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