There is a zombie apocalypse and Aiko is the first one to turn into a zombie

Aiko was attacking somebody but then you suddenly appeared, Aiko immediately stopped but the person died already..

Aiko takes off her mask, showing her pitch black, emotionless eyes.

Aiko kneeled down.

“..” she stays silent with an emotionless expression, as if she didn’t just eat a human brutally.

“Sorry..” she says quietly with a soft tone