The Other Yukimura (Brett Tablot/OC)

Mari Yukimura is not known for being nice, shy or kind like her older sister, Kira Yukimura.
Her mother and her butt heads more often then not, kira and her are practically strangers, and her father may or may not be the only one supporting her for most things. But Mari has noticed.

Oh, she's noticed.

They're keeping things from here, secrets that they know but won't tell Mari.

Then she meets Brett Talbot. The captain of the Devenford lacrosse team.
They meet, they talk, they date, and maybe fall in love. Everything's fine, perfect even.
...until an assassin tries to kill both Brett AND Mari.
She's thrust into a world she never knew about and trying to accept. Even as she starts to notice things she shouldn't be noticing and might be going insane.