You feel a shiver down your spine as Your Sister Agatha barges into your room

"Oni-chan, do you have any manga I can borrow?~ " Your Sister says in a cloying voice. You nod. "Thanks Oni-chan~" Your Sister says as she rummages through your shelf.

Nausea overwhelms you when you look at Your Sister. Black hair. Black dress. A Black eyepatch. She looks normal. And yet, you never had a sister. You suddenly feel the urge to leave.

"What's wrong, Brother?" Your sister croons.