Yuuki? Haruhi's brother?

Haruhi Fujioka always thought she was an only child but Ranka, her father, had a big secret he was hiding from Haruhi. One day WAY in the past Ranka had gotten drunk and he did IT with a rich lady. A few weeks later Ranka is confronted from the lady, saying that she was pregnant and it was his child. Ranka freaked out, not knowing what to tell his wife, or even his one year old daughter, so he decided to not tell them period.

A few years later, Ranka's wife died and left Ranka and Haruhi all alone in the world. But right after that he found a letter from his wife telling him that she always knew and she wished he would have told her. He then sought out the rich lady, who's name is Ryoko, and saw his second born child, a little 'boy' named Yuuki. At first he was confused on how his only BOY looked just like a girl. No one really knew why but it was certain, he was a boy.

10 years pasted and Yuuki and Haruhi is starting their first year of high school, at the same school, little to Haruhi's knowledge. Although it seems one person knows in Ouran Academy, Kyoya Ootari. Can Yuuki keeps his relation to Haruhi a secret? Or will Kyoya go against Yuuki and tell everyone? Including Haruhi.