It starts off showing some artificial astronomy thing (what are those called again?), and then goes to some little girl who looks like Tohsaka Rin... I think it's actually Mikiya's sister a bit younger? she mentions a certain childhood dream she had but can't recall.
And now she's older, and some fairy flies up to her at her school... she introduces herself as the mage apprentice Azaka Kokuto, and gives her side of the story, how Shiki is her rival in love... She's completely open about the fact that she's in love with her brother... She even became a mage apprentice just so she can take on Shiki and force her to give Mikiya back... Toko gave her a mission to find and eliminate the magus who is using fairies to spread anxiety among the students at her school...
Since you can't see the fairies, you'll need the eyes.Azaka and Shiki go to have a meeting with a teacher to ask him about the rumor about fairies attacking the school... he seems to know about fairies somehow, but doesn't believe that they were the cause of this one student's recent suicide. then the student council president comes and makes Satsuki-sensei come and help with council stuff... She tells them not to waste the teacher's time about this fairy stuff.
Later, Shiki sees a fairy and starts chasing it, and Azaka gets mad and doesn't take the clue that she has a lead... Then Shiki wakes Azaka up and tells her something that gets her mad at the fairies. They resume their investigation.. Azaka talks about some girl who committed suicide, ran out of class crying and saying "The fairies are coming!"... and then she ran into the old abandoned school next door and set the place on fire to kill herself... Somehow nobody else remembers this... Shiki says they're probably using the fairies to erase people's memory of this event, and killing people probably isn't their intention, it's just turning out that way.
Later, Azaka fights Shiki in bed and takes back a knife she stole.. Shiki finds out that she's in love with Mikiya, and she confesses. She doesn't remember the time when she fell in love with him, though.. that's why she asked Shiki if it's possible for people to get back memories that were taken from them, and she's disappointed when the answer is no.
Azaka ends up finding out that