My Angelic Omega Sister Killed Me Twice

My adopted Omega sister, Maya Bardolph, is known to be innocent and kindhearted. Before the practical admission assessment, I specifically tell her not to interfere in any way. But she secretly puts a prohibited performance booster into my water bottle. I am reported for cheating on the spot. My results are canceled, and I am permanently blacklisted. When I break down and demand an explanation, she bursts into tears, looking pitiful and wronged. She weeps, "Sierra, I just wanted you to get first place... I didn't know things would turn out like this." My boyfriend, Dale Ashshade, immediately pulls her into his arms and blames me instead. He scolds, "She is only trying to help. Why are you being so harsh to her?" My parents chastise me frostily as well. "Isn't it just one practical assessment? She's an Omega. She doesn't understand these things. Can't you be more patient with her?" To apologize, Maya smilingly brings me a cup of herbal tea later. "Sierra, I made this just for you. Promise you won't be mad at me anymore after you drink it, okay?" Without thinking much about it, I drink the tea. But what she uses to brew the tea is highly poisonous silver oleander. I die from the poisoning. Outside the emergency room, Maya cries hysterically, "I'm sorry! I didn't know silver oleander is poisonous... I just wanted to apologize to Sierra..." When questioned by the Enforcers, Dale calmly gives false testimony. "After Sierra was caught cheating, she became mentally unstable. She couldn't accept how things turned out and took silver oleander to kill herself..." When I open my eyes again, I return to the day before the assessment.