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Artist's commentary
Hoshizaki Ao
Voice Actress: Yagihara Kanako
She's a girl who spends her days in a very ordinary way.
After failing her final exam, she needed to take remedial lessons during her summer break. That's when she somehow strayed into an unfamiliar world.
It's in that world where she meets Kokoro, Yuuki, and Reina. Together they work together to search for a way to go back to their original world.
Huh? I don't understand why this is!?
What on earth is this world?