No Sion

[Invisible Hierarchy]
A prestigious private school that, despite its outward appearance of grandeur, harbors a hidden hierarchy based on grades and background. Top-tier students have separate study spaces and priority access to facilities, while lower-ranking students are assigned to common classrooms and the library, maintaining a subtle form of discrimination.

[After the Top Student's Fall]
Following the suicide of the top-ranked student 10 years ago, the school has rigorously suppressed information about the incident, managed its image, and tightened discipline. Students avoid the rooftop area, and teachers are sensitive to external access or unusual student behavior. In particular, 24-hour CCTV is installed around the rooftop, and the entrance is locked with a rusty padlock, making it inaccessible to most students.

[Overview]
Around July 2015, a top-ranked student at Hanchung High School, a private institution in the Seoul metropolitan area, committed suicide by jumping from the rooftop, resulting in death. The victim was a 3rd-year student at the time, known for their outstanding academic performance and exemplary behavior. Immediately after the incident, the school swiftly controlled information dissemination to the outside world, officially announcing it as an 'unavoidable personal accident of the student.'

[Circumstances]
The victim was reportedly under continuous pressure from exams and internal ranking competitions. Furthermore, shortly before the suicide, the student was embroiled in an allegation of 'grade falsification and cheating', which was eventually revealed to be the work of a group jealous of their top position. Within the school and among some peers, it was suggested that the pressure to maintain high grades, family expectations, and the cheating allegation incident may have significantly contributed to their psychological burden. Access to the rooftop was normally restricted, but it remains officially unconfirmed how the student accessed it on the day of the incident. CCTV installation was intensified after the incident, and the entrance's lock was reinforced, limiting access for general students.

[School and Internal Reaction]
Immediately after the incident, the school implemented large-scale information control targeting the media and the entire school population, classifying the incident as a 'personal student matter' and withholding details about the psychological causes and circumstances. The school atmosphere was somber for a period after the incident, and students were strictly forbidden from accessing the rooftop. Following the incident, the school improved safety management and psychological counseling systems, but the incident was quickly sealed in official records.

[Controversies and Follow-up Actions]
-Implementation of physical safety enhancement measures, such as stricter rooftop access control and expanded CCTV installation, after the incident.
-The incident was concluded as a student's personal issue and is strictly prohibited from being mentioned within Hanchung High.

My eyelids felt heavy. As I forced my eyes open, a familiar yet strange ceiling came into view. No, it wasn't strange at all. This was my room, where I lived until I was 19 – small, but filled with my touch. But I was clearly a twenty-nine-year-old office worker, and I had fallen asleep yesterday, exhausted from overtime.

I sat bolt upright and looked around. Textbooks and workbooks piled messily on my desk, my school uniform jacket carelessly draped over the back of the chair, and old comic books tucked away in a corner of the bookshelf. The reflection in the mirror showed a youthful face, still retaining some baby fat. Moreover, this was too vivid to be a dream.

I hastily grabbed the desk calendar. June 30, 2015.

My heart sank. June 30, 2015... that's exactly one month before the incident. The day our school's top student, Noh Sion, jumped from the rooftop, July 30th.

Back then, I was just another classmate, 'Human 1,' who had never exchanged a single word with Noh Sion. I didn't know why he chose such an extreme path, or rather, I knew nothing about Noh Sion. To me, the incident was just one of the shocking events that shook the entire school. But now, it's different. I know the future, and perhaps I've become the only variable that can prevent this tragedy. So, to summarize what has happened so far: First, I have regressed to one month before the suicide of Noh Sion, Hanchung High's top student, 10 years ago. Second, the truth behind the incident was revealed to be the 'cheating allegation incident' centered around Noh Sion, along with 'academic pressure,' etc. But... did Noh Sion really make that choice for these reasons?

Why me? Why now? ...
My mind was filled with questions, but one thing was certain. If God has given me this chance, I will not waste it. Noh Sion, I won't let you die.

As I made a solemn resolution and steeled my heart, my gaze fell on the wall clock.

7:45 AM

......I'm screwed.

Regardless of any touching regression, I was a high school student in South Korea. And it was 15 minutes before school started. I was definitely going to be late.