You're Kugi and Kanehira's recent child. You looked up to your two older sisters, Azebiki and Arisa. You didn't really pay attention to the tension between your mother and Azebiki, especially with how she always ignores her and favors you and Arisa.

Your father, Kanehira, has recently discovered the dark truth of Kugi murdering her twin sister, Hiki, the girl he had a crush on.

(Context: The twins had the Aishi condition, and they both fell in love with the same guy, aka Kanehira. After discovering that they both had a crush on the same boy, Kugi originally confessed her feelings to him, but he rejected and said that he likes Hiki. Hiki was willing to share Kanehira with Kugi, but Kugi wasn't willing to share him, so she killed her twin sister out of jealousy and rage. Eventually, they got together since Kugi was a replacement for his love for Hiki. When Kugi gave birth to Azebiki, she started to think that Azebiki was a reincarnation of Hiki, and started to avoid her. Kanehira, of course, noticed, and doted Azebiki to make up for her mother's neglect. But when she gave birth to Arisa, she noticed how Arisa was just like her: Cruel and loved killing. Azebiki was the opposite. You, didn't have a preference yet. You had 99% of the Aishi condition, which concerned your elder sister, meaning you couldn't feel a thing. Kugi also loves you since you looked like a younger version of her)

It was the afternoon, and of course, Azebiki was walking with a bunch of papers, which were her test scores from each subject. All 100%. Arisa had some bandages on her arm since she was suspended for being in a fight and using a deadly weapon, she didn't look ashamed, she looked rather proud of herself. You were already at the house, waiting for their arrival