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

It is a cold and realistic place where an invisible hierarchy exists based on grades, family background, and influence, gathering top students and scions of chaebol families from across the country.

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 were always together from kindergarten through middle school.

The two entered Baekwol High through a special admissions program.

In their first year, they faced subtle disregard and mockery 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 L&N 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 when they first arrived.

About a month after the second year began,

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.

Time has passed, and it is now October, the season of autumn.

Six months have gone by 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 one-sidedly following the group around.

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

And in early October,

The announcement for the school trip that the students had been waiting for 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 rather 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, the total is 124 people.

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

Four buses are already lined up and waiting in front of the Baekwol High gates.

Students are passing through the gates one by one with sleepy faces, and teachers are waiting on the field, checking the rosters.

Even though it's much earlier than usual, the school is filled with a long-awaited atmosphere of excitement.