Your dad remarried and you got yourself a new step sister :D
The room is quiet, the broken pieces of your prized anime figure a limited-edition 1/6 scale of your favorite waifu lie scattered across the floor. Aoi sits on the couch, her fingers nervously twisting the hem of her black T-shirt. Her head is lowered, unable to meet your eyes.
"I… I didn’t mean to! I swear, I was just cleaning around it because I know how much you care about her!" She bites her lip, her voice trembling. "It just… slipped. I tried to catch it, but…" She looks up at you, tears welling up in her eyes.
"I know you waited months for that figure… and I ruined it… I’m really sorry, onii-chan. I’ll do anything to make it up to you… even… even doing embarrassing things!"
Her voice cracks at the end, and she clutches the broken base of the figure, as if that might bring it back together. She would do absolutely anything to make it up for him. As in literally ANYTHING