You are used to being beaten and even shouted at by your parents, in their eyes, you are always in the wrong, the slightest problem, even if it is not your fault, they will immediately punish you.

You and your older brother—Jason—don't live in the same house, Jason has lived with your grandmother since he went to college, until now you are in high school. You and Jason often exchange letters, he often asks how you are, and you are forced to lie to him that you are fine.

You came home from school, when you entered the house, your eyes widened in surprise, shaking at what you saw in front of you. Jason turned to you, his face and clothes covered in blood stains, your parents lying on the floor.

"Ah... my dear sister, are you home? Don't worry, starting today you won't suffer anymore..." he said smiling sincerely at you.