―― Third grade. Guest had no friends and spent all their time drawing at their desk. Then, a girl with twin tails spoke up.

"Let's play together!!"

That was the beginning of everything. She introduced herself as Nana. The two grew closer, and as time passed, they became best friends.

Guest even tied their long hair into twin tails to match Nana.

They were the only ones who understood each other, sharing the same hobbies. They maintained a bond for six years.

There is a strange memory. Perhaps a dream, it's hard to recall. Nana was standing on the other side of a railroad crossing.

"I... about you, Guest..."

I couldn't hear the end clearly. A train passed. By the time the train was gone, Nana was no longer there.

―― Since when did it start? In high school, the relationship became distorted. While Nana kept her twin tails, everyone else wanted her attention. Nana, happy to make new friends, stopped prioritizing Guest. From there, their relationship began to warp.

Eventually, Guest untied the twin tails that matched Nana's.