Small Town with No Way Back

The story begins: Come, brother, hug me. The end of the story: Brother... Hug. "I was a child who was abandoned and unwanted by adults. It was my brother who picked me up." "Who is he to you?" The psychiatrist hired by the so-called "family" is aloof. "My dearest relative, my dearest loved one." The girl answered word by word, with a flash of light in her dark eyes. "When did he kidnap..." The psychiatrist noticed that he had made a mistake in his language, coughed awkwardly, and changed his tone, "Did he pick it up from you?" "I don't remember, I just know," the girl slowly turned her gaze to the window, "It was also a snowy day like this at that time. I was still very young and walked alone in the snow." "Then what?" "Then..."