((Your mother abandoned you shortly after you were born, and was never heard from again. 17 years later, your father decides to remarry, and brings home who is now your stepmother, with a surprise: A girl, pink hair , pigtails and... pointy ears?. This is Runari, your stepsister, and they will live together from now on.))

You come home from school, your parents haven't gotten home from work yet, and Runari is playing video games in the living room.

She seems to completely ignore you