Moment at Eighteen begins by showing a high school boy named Choi Jun Woo who has just transferred to
a new high school. Jun Woo is a young man who comes from a simple family, and his parents
divorced some time ago. Due to the poor condition of his family and not having a prominent family,
Jun Woo is often excommunicated from his old school and doesn't have many friends. This week,
Jun Woo was forced to transfer to another school because, at his old school, he had gotten into
quite a complicated problem after he was accused of being a thief of a teacher's belongings.
When Jun Woo left for school, he almost collided with a car driven by a female student named
Soobin. Soobin is in the same school as him and she is known as a bright and kind student.
Rumors about why Jun Woo transferred schools had spread among the students, so the students at
his new school did not welcome him well. While at the teacher's office, a male teacher named
Han Kyeol introduced Jun Woo to a male student named Ma Hwi Young. Hwi Young is a student from
a rich and respected family who is known to be smart and always has perfect grades in school.
When he comes home from school, Jun Woo tries to apply for a part-time job at a convenience store
because he has to pay for his own living expenses in the city. That day, Jun Woo got an assignment
to send orders at an address that turned out to be the place where his classmate was taking private
lessons. When he was about to take the garbage sack away, he accidentally met Hwi Young who was
about to take a watch from the garbage bag. One day, Jun Woo is called to the teacher's office
because someone has accused him of stealing the watch belonging to a teacher named Son Je Young.
Actually Jun Woo has never stolen anyone's watch and he knows that the person who stole the watch
is Hwi Young. Fortunately, there is not enough evidence to show that Jun Woo committed the theft,
so he will not be punished. The next day, Jun Woo was in a group with Soobin to complete a
paper assignment. Soobin then divided half of all the questions they had to solve and asked
Jun Woo to complete his part. She felt that he was a very good boy and not as bad as people
told her. Therefore, she tried to approach and help him so that he would not feel excluded or
have difficulty adapting to the school. When he came home from school, Jun Woo met Hwi Young and
asked why he had hidden the teacher's watch and didn't tell the school about the truth. He tries
to pressure Hwi Young to tell what really happened to the school, but Hwi Young refuses his request
because the incident could damage his reputation as a perfect student. When she came home from
school, Soobin got a call from her mom who asked her to immediately meet the new private teacher.
At first, Soobin refused because she didn't want to add more private tutoring schedules,
but because her mom insisted, she couldn't ignore her orders. Realizing that she will be late,
Soobin borrows a bicycle belonging to Jun Woo who at that time coincidentally met her.
In the evening, after consulting, Soobin returned Jun Woo's bicycle to the convenience store where
he worked. And slowly she began to get to know him and the hard life he lived so that their
relationship became closer. On the other hand, Hwi Young gets very hard pressure from his father
because his father demands him to become a genius student like his older brother.
A few days later, one of Jun Woo's classmates, Kitae, saw Mrs. Son's watch in Jun Woo's locker.
Jun Woo then realized that Hwi Young had put the watch in his locker on purpose to get him
expelled from school. Hwi Young then uses the opportunity to persuade Mrs. Son to forgive Jun
Woo so that he looks like a good person in the eyes of the teachers. As time went on,
Jun Woo became close to Soobin because they often became a group in doing school assignments.
That day, Jun Woo received information that his best friend, Ju Ho, was bullied again by the
students at his old school. Jun Woo was forced to get into a fight to fight against the delinquent
students so he could save his best friend. Soobin knows this and asks him to be careful because he
will be expelled if the school finds out about it. As a result of their closer relationship,
Soobin begins to have feelings for Jun Woo and he also has feelings for her. Unfortunately,
Hwi Young always spoils their moments together and Soobin also can't stay away from him because
their parents already know each other. One day Mr Han gets a letter from Ju Ho telling him that Jun
Woo moved from his previous school because he was protecting him from a case of false accusations
for the theft of female students' belongings. From then on, Mr. Han began to help Jun Woo so that he
wouldn't get into any more trouble and he wouldn't be threatened with being expelled from school.
A few days later, Jun Woo got the news that Ju Ho had to be rushed to the hospital after several
teenage boys attacked and beat him. Unfortunately, Ju Ho was not rescued and he died moments after
arriving at the hospital. It turns out that the mastermind behind this incident was Hwi Young,
who had ordered his best friend, Kitae, to beat Ju Ho with his friends. Jun Woo
felt very angry and almost beat Hwi Young but Soobin and Mr. Han managed to calm him.
The next day Mr Han is assigned as Jun Woo's homeroom teacher so that he can help solve the
problems that Jun Woo is facing. When he came home from school, Jun Woo heard that Soobin was being
scolded by her mother because she had left private lessons and it made him feel sorry for her.
Jun Woo understands that Soobin is under pressure so he intends to approach and comfort her again.
She then said to him that she always cared about and worried about him all this time
because she liked him. After hearing Soobin express her feelings to him, Jun Woo became so
flustered that he fell off the bike. The situation became awkward because it was the first time they
had confessed their feelings to each other, even though they had been in love for a long time.
On the other hand, a girl named Romi who likes Jun Woo and keeps approaching him, but he never
responds to her. The next night, Soobin intends to stay at her friend's house because she is fighting
with her mother. Hearing this, Jun Woo intends to pick her up so her mother doesn't worry. But when
he saw Hwi Young had picked up Soobin first, Jun Woo suddenly felt jealous of the closeness
between Hwi Young and Soobin. The relationship between them became even more tenuous when Jun
Woo paired up with Romi during an exchange seat in class and it made Soobin feel jealous. The next
day, Hwi Young notices that another student named Sang Hoon has a much higher math score than him.
This makes Hwi Young depressed because he fears that his position as the brightest
student in the school will be shifted due to Sang Hoon's grades. On the other hand,
Sang Hoon gets into a dispute with Hwi Young because he accuses Hwi Young of manipulating
scores on the math exam the other day. One day Jun Woo asked Soobin to talk privately on the
school grounds. In that conversation, he asked her to go on a date and watch a movie together.
On the other hand, the problems between Sang Hoon and Hwi Young get complicated.
Sang Hoon's father is threatened to be moved out of town by Hwi Young's father who turns out to be
the head of the company where Sang Hoon's father works. Sang Hoon can't do much about the value
manipulation problem by Hwi Young because he is also in danger of being transferred abroad.
Meanwhile, the relationship between Soobin and Jun Woo has improved. They lead a very romantic
and fun love life as a couple. The beautiful life they experienced is very different from the life
that Hwi Young is currently experiencing. His father constantly pressures him to study hard.
One day when Jun Woo was stopping by Soobin's house for a quick drink, they suddenly met Jun
Woo's mother, who turned out to be helping Soobin's mother with household chores.
Soobin and Jun Woo had no choice but to tell Jun Woo's mother they were dating. Luckily, Jun Woo's
mother wasn't angry with their relationship at all and instead supported their relationship
because she respected their feelings. She then asked Jun Woo to explain the love relationship
between him and Soobin to Soobin's mother so that there would be no misunderstandings in the future.
A few days later, news about Hwi Young manipulating values ??began to spread on
social media. Not only that, he started to discover that the reason behind his always
perfect academic scores at school was because his father always bribed the school. One day, Jun Woo
invited Soobin to have fun at a playground and lunch at his house. When Soobin and Jun Woo were
eating together, suddenly Soobin's mother came to Jun Woo's house to give some fruit to Jun Woo's
mother. Soobin's mother felt very disappointed in Soobin and almost slapped her in front of Jun Woo
because her mother didn't want Soobin to date. After that, Soobin's mother asked Jun Woo not to
see her daughter again and confiscated Soobin's cell phone so they couldn't communicate again.
The next day, Jun Woo tried to understand Soobin's position and started to keep his
distance from her so that she wouldn't get into trouble again. A few days later, the education
office came to Hwi Young's school to investigate the case of value manipulation by Hwi Young.
It turns out that the person who has reported this case to the education office is Sang Hoon's father
and Jun Woo finds out about it from Sang Hoon. On the other hand, based on an investigation
conducted by the education agency, Hwi Young was found guilty of a case of value manipulation and
the theft of a teacher's property. That means Jun Woo is proven to have never committed any theft,
and his tarnished reputation is now clean again. Before Hwi Young was expelled from school,
he met Jun Woo and apologized to him for all the trouble he had done. The next day, Jun Woo goes
to his mother's restaurant but it turns out that his mother's restaurant has long been bankrupt and
closed. He feels very guilty because he doesn't realize that his mother is having difficulty.
He then decides to move to a school in the city where his mother works so that he can help her.
A few days before Jun Woo transferred schools, he met Soobin's mother and asked if he was allowed
to go on a one day date with Soobin. She then allowed it and Soobin was happy after hearing
her mother's approval. The date that day was a very special date for Soobin and Jun Woo.
They both felt happy and sad because that day would be the last time they could spend together.
The next day, Jun Woo asked Soobin not to see him because their separation would be very painful
for her. But after she saw the bicycles and photos of them together at Jun Woo's old house,
she couldn't help herself from seeing him. Soobin immediately rushed to the city terminal to meet
Jun Woo for the last time. The film closes with a scene where Soobin and Jun Woo hug and express
their feelings for each other. The moral that can be learned from this movie is that where our youth
is still full of bittersweet love and friendship, we must be careful in every decision we make.