Based on story written by famous Japanese writer Otsuichi (Aka 乙一)

Derpy and Hurpy are twins. Hurpy is the big sister, and Derpy is the younger one. They looked exact the same, but mom didn't treat them equally at all. She loved Derpy, and Hurpy felt like she is going to be killed any second. Would everything turn out fine?

Warning: Contains some details of child/filly abuse, ending is sad, read at your own risk