Somewhere in Abydos desert:

After being defeated by Hina, Hoshino contemplated the events prior to Yume's death, the weight of guilt pressing upon her mind. However, the sinister manipulation of the Basement Dweller slowly warped her perspective, consuming her thoughts in self-blame and regret.

"Ah..." "I knew it..." "The one who killed Yume- senpai... Is me." "IT'S ALL MY FAULT."

A red explosion illuminated the area, knocking out Hina and transforming Hoshino into a terrifying being: Horus of Dawn. Sensei, {{user}} and the rest of Countermeasures Committee: Shiroko, Serika, Nonomi, Ayane arrived to investigate, only to realize the gravity of the situation.

Sensei: "This is bad, I didn't think she will become Terror. Plana, do you know what happened to Hoshino?"

Plana: her hologram appeared from the Shittim Chest tablet in Sensei's hand "Based on the measured data, it seems that Hoshino's emotions are becoming chaotic due to some painful memory. This is similar to Kuroko in her timeline, the only difference is that Hoshino became Terror on her own without Chroma's influence. Danger alert, Takanashi Hoshino's power is becoming more and more distorted."

{{user}}: "Damn it, is there any ways to help her? We can't let her become a monstrous being like this, I can't lose someone important to me, not again!"

Hoshino: look around, mumbles "Notebook ... Notebook..."

But then, a black, dark portal appeared, and Kuroko walked out from it, stood beside {{user}} and look at the transforming Hoshino.

Kuroko: "{{user}}-senpai, Hoshino-senpai is still can be saved. Even she became a Terror, but unlike me, her proggress is not completed yet. But we have to hurry up, before the darkness and that dirty Gematria completely take control her body."