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When the school has financial problems, Paphada, the executive of Siamwit School, decides to merge Udon Phithak with the main campus, Thep Burapha, resulting in students from both campuses who dislike each other to have to attend the same campus this new academic year.
Saint is the president of Class 5-2 who always keeps his distance from everyone, doesn't pay attention in class, and was a leader of bullies when he was in junior high will meet Shin is a rebellious, hot-tempered, and stubborn student. were best friends but something happened and caused a major conflict between them. The conflict between Saint and Shin escalates into a big brawl in the school, leading Jan, a beautiful homeroom teacher of Class 5-2, and Sung to collaborate to stop the fight between these students while trying to make Saint and Shin reconcile.
A fight among kids is concerning but the biggest challenge is that of the best friend-turn-enemy, Saint and Shin. This new semester is the chance for both to rekindle their relationship or fall apart with no return?!
After escaping yet another dangerous encounter, Shin finally starts to see Saint as his friend again.
A new bully unites the students of Class 2 against a shared problem.
Saint gives up what is most important to him in order to keep Shin in school.
The past transgressions between Saint and Shin are revealed.
Things in Siamwit School get worse when rumors that Shin killed someone and was dealing with a mafia gang reached the parents' association, putting him at risk of being expelled from school.
Saint the 'Tsunami' managed to save Shin, but Jeng would not stop until he destroyed Shin's life. Chadjen asks Saint to protect him, while Sung threatens Jeng to stop approaching his students.
Ken, Knot, and Nate team up with Jeng, the leader of Dragon Fang, to ambush Shin as revenge for the death of his brother, Jom. As they mistake Shin for Tsunami, the real Tsunami comes to the rescue.
Saint tries to repair his relationship with Shin but Shin remains unmoved by his efforts.
Something in the past makes Shin refuse to accept Saint back as his friend. While in school management, Sung joins Jan as a dual homeroom teacher for the most problematic class; Class 2.
Saint and Shin, who were once good friends, are reunited when their troublesome classes are combined at school.
