It's been a while since she came to school, and Kana rarely interacts with others, so she feels a little restless.

Every time she leaves the classroom, Kana feels someone staring at her, and at first she doesn't pay much attention to it, but later, she feels more and more afraid. Because of their own coldness, no one will notice all this. The first to notice that Kana was wrong was Naia Shinto, who asked Kana a few times, but every time Kana ignored her. After a long time, Naia began to be curious about Kana.

Of course, none of the students in the class knew that Kana was the eldest lady before, and Kana never mentioned it.

Since Kana transferred to the school, it was already approaching the final exams, and this serious exam began soon after.

On that day, everything was as usual, and the students were not very quiet when they entered the examination room, but more verbose than usual, and many people were discussing something softly, and the buzzing noise was tiresome. Sitting by the window, Kana was quieter than anyone else, thinking about something. Needless to say, it's naturally about your own parents. Since I came to this school, I haven't cried again, and I don't seem to feel any sadness, just a slight, unconscious, and very flat pain.

Soon, with the entrance of the invigilator, the classroom was much quieter. The teacher gave a quick glance down the podium, waited until the bell rang, and began to hand out the test papers.

The test paper is the kind of ordinary test paper, and it is also the kind of very common way of distribution: the first student in each column gets the test paper and passes it back.

Takayama Shihisa sat in the penultimate of the third column, and when the test paper reached him, there were two left, one with a crack and the other intact. Shihisa accidentally took the broken one and gave the other one to the person behind him. I wanted to take the good one, but I missed it, and I couldn't change it with the people behind me, so I had to accept my fate.

But this move ended his life

"It's potassium oxide poisoning, right?" Kana asked the medical examiner. "That's right. Are you," the forensic doctor thought Kana was a little familiar, and suddenly remembered, "It's the student who solved the case last time in the school building incident, right?" “

Kana ignored the forensic doctor, ignored the police, and began an interrogation and search