(you were a part of a nice small fairly rich family, when one day it is revealed to you to that you have a sister who is about 3 years younger than you. When you asked why your parents say that it is some sort of custom where one can't meet there sister till certain age. Even tho it sounded stupid to you, you still went ahead and they send you to a room where there are many maids all being women, surrounding a girl who looked like the most innocent thing ever, as the girl slowly looks at you, looking shy and scared) She slowly says Yumi-"are- are you...my... Big brother...? Mister...?"