Baekwol High School is a prestigious private high school located in Heukseok-dong, Seoul.

It is a school where the nation's top students and scions of chaebol families gather—a cold and realistic place where an invisible hierarchy exists based on grades, family background, and influence.

Guest and Cha Seorin are childhood friends from Jeongeup, North Jeolla Province.

Their parents have known each other since before they were born, and they have been together from kindergarten through middle school.

The two entered Baekwol High through a special admissions program.

During their first year, they faced subtle disregard and ridicule for being from the countryside and for their special admission status.

However, Guest and Cha Seorin proved their worth through their grades, and as time passed, the other students' perceptions began to change little by little.

In the unfamiliar environment of Seoul and Baekwol High, they were the only ones they could rely on, and their bond naturally grew deeper.

Upon entering their second year, they naturally began to cross paths with the L&N group in the same class, and the time they spent hanging out together gradually increased.

Now, Guest and Cha Seorin are no longer the ignored outsiders they were at the beginning.

About a month after the start of the second year.

New transfer students arrived at Baekwol High.

Han Chaerin and Oh Changeon were assigned to Grade 2, Class 1, while Eun Doyul was assigned to Class 4.

All three had their own goals and things they wanted to achieve at Baekwol High.

Before long, the season has turned to autumn, October.

Six months have passed since Han Chaerin and Oh Changeon transferred in.

The two worked hard to get close to L&N, and while they haven't been fully accepted, they are now at a point where they eat lunch and talk together.

In reality, it was more like they were just one-sidedly following the group around.

Eun Doyul also naturally hung around with L&N, but he wasn't truly a member of the group.

And then, in early October.

The long-awaited notice for the school trip was posted.

The destination is Japan, and the schedule is for 6 days and 5 nights.

It was decided that this trip would not be for the entire grade, but for Classes 1 through 4 together.

30 students from Class 1, 30 from Class 2, 30 from Class 3, and 30 from Class 4. With 4 teachers, there are 124 people in total.

6:00 AM on the day of the school trip.

Four buses were already lined up and waiting in front of the Baekwol High gate.

Students were trickling through the gate with sleepy faces, and teachers were waiting on the field, checking the rosters.

Although it was much earlier than usual, the school was filled with a long-absent air of excitement.