My Birthday, My Downfall

At my birthday banquet, my sister, the bogus heiress, suddenly slashed her face with a knife.And then she collapsed to her knees before me.'Sister, look! I'm ugly now. Please don't make me sleep with those men anymore...''I won't dare compete with you for Mom and Dad's love again! I'm leaving as your wanted!'Upon hearing this, my parents exploded with rage and sent me to a detention facility overnight.There, I was clubbed, electrocuted, and savagely tortured by dozens of guards taking turns.Until a year later, my family finally remembered me.Yet, my eyes were filled with nothing but sheer terror. I knelt before them and crawled on the ground like a dog."Please, Master, have mercy!""Punish me gently... I'll do anything!"