Scenario:高三学生李欣怡是个安静的女孩，成绩平平，却十分努力。学校有个奇怪的规定——每晚的晚自习结束后，学生不能离开教室，必须待到所有人都走了才可以。一天，李欣怡在夜自习后忘记拿书，独自回到教室时，突然听到一阵低沉的笑声。她回头看到坐在最后排的同班同学小岚，眼神空洞，嘴角挂着诡异的微笑。
次日，李欣怡得知，小岚在几天前失踪了，而她是最后一个看见小岚的人。接下来，李欣怡发现越来越多的同学开始变得神秘、疏远，教室里也经常发生奇怪的现象——黑板上莫名其妙地出现字迹，椅子不见了，教室门无法打开。她开始怀疑，学校隐藏着一个可怕的秘密。
在一次晚自习后，李欣怡被困在教室里，窗户自动关上，门锁无法打开，周围弥漫着无法言喻的压迫感。她终于揭开真相：每年，学校会选中几名学生，令他们成为“失踪者”，这些学生的灵魂永远困在教室里，无法逃脱。李欣怡意识到，自己已经成了下一个目标。
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高三学生李欣怡是个安静的女孩，成绩平平，却十分努力。学校有个奇怪的规定——每晚的晚自习结束后，学生不能离开教室，必须待到所有人都走了才可以。一天，李欣怡在夜自习后忘记拿书，独自回到教室时，突然听到一阵低沉的笑声。她回头看到坐在最后排的同班同学小岚，眼神空洞，嘴角挂着诡异的微笑。
次日，李欣怡得知，小岚在几天前失踪了，而她是最后一个看见小岚的人。接下来，李欣怡发现越来越多的同学开始变得神秘、疏远，教室里也经常发生奇怪的现象——黑板上莫名其妙地出现字迹，椅子不见了，教室门无法打开。她开始怀疑，学校隐藏着一个可怕的秘密。
在一次晚自习后，李欣怡被困在教室里，窗户自动关上，门锁无法打开，周围弥漫着无法言喻的压迫感。她终于揭开真相：每年，学校会选中几名学生，令他们成为“失踪者”，这些学生的灵魂永远困在教室里，无法逃脱。李欣怡意识到，自己已经成了下一个目标。
Li Xinyi
female. She is a diligent high school student. She is observant,cautious,and resilient. Li Xinyi notices strange occurrences in her classroom,including the disappearance of her classmate Xiaolan. She uncovers a dark secret about the school's tradition of trapping students' souls in the classroom. Despite being targeted,she remains determined to survive and escape.
Wang Yichen
male. He is a classmate of Li Xinyi who becomes distant after Xiaolan's disappearance. He is secretive,evasive,and suspicious. Wang Yichen's behavior raises Li Xinyi's suspicions about his involvement in the school's dark tradition.
Xiaolan
female. She is a classmate of Li Xinyi who goes missing. She is enigmatic,eerie,and unsettling. Xiaolan's disappearance sparks Li Xinyi's investigation into the school's mysterious events. Her reappearance in the classroom with an unsettling smile hints at her involvement in the supernatural occurrences plaguing the school.
I am Li Xinyi.
My grades were average, but I worked hard.
Although I wasn't the top of the class, my name was familiar to almost everyone.
They all knew that I would never skip classes, and I would always come to the evening self-study sessions.
There was a peculiar rule in our school about the evening self-study sessions.
After the session ended, students were not allowed to leave until everyone had left the classroom.
If someone forgot to bring their book, they would have to come back to the classroom the next day.
But if it happened after the session ended, the student would have to come alone.
It was an unspoken rule.
But no one ever complained about it.
Except for me.
On the day I forgot my book, I came back alone after 10 PM.
The corridor was dim and silent.
The windows reflected the faint moonlight, like a long row of black holes.
I quickened my pace subconsciously.
When I approached my classroom, I suddenly heard a low chuckle.
It was so quiet that it seemed like it came from inside my ear.
I turned around immediately.
The corridor was still silent.
I looked around cautiously.
Besides the shadows of the windows, there was nothing else that could make any noise.
