At Pantanawittaya, students are expected to strictly follow the rules without question, but Nanno relishes breaking as many as she can.

The truth about what really happened back in high school is revealed. Nobody is innocent, and Nanno makes sure there are no happy endings.

Nanno tries to help a poor student named Yuri get even with the rich classmates who treat her like a servant, but Nanno may have met her match.

Even among the filthy-rich kids at his school, Dino stands out -- but he's got a secret. Nanno can help him keep it, but it will cost him.

Because of her rich and connected father, Minnie never has to face any consequences - until her recklessness gets her classmates killed.

TK can't stop stealing, and his new friend Nanno only encourages him to continue. But underneath it all, he's just a lonely kid who misses his father.

After opening a time capsule at a high school reunion, former pupils recall an odd girl they nicknamed "Psycho Nanno," who was briefly in their class.

Popular influencer JennyX's parents pressure her to maintain her image to keep the profits rolling in, but things change when she meets Nanno.

Nanno and Yuri's rivalry comes to a head over the fate of a mother and daughter who may be responsible for a slew of disappearances and deaths.

Nanai is a popular boy in school with a bad habit of getting girls pregnant, so Nanno decides to give him a taste of his own medicine.

Enigmatic student Nanno transfers to a school that has recently earned the title of "Purest School Of The Year", but she soon exposes the ugly truth.

Other students learn about the bathroom wall and start using it to get their own revenge. Bam regrets what she's started, but it may be too late.

The boys all want to take advantage of Nanno and the girls are jealous and cruel. They try to destroy her, but Nanno always has the upper hand.

Ms. Aum is told by the school director to change her strict teaching style. But the stress of her past pushes her beyond the breaking point.

A senior student named Kaye takes things too far while having a group of junior students. This time, it's Nanno's turn to try and break his spirit.

Surrounded by so-called geniuses, struggling student Mew feels stupid and invisible in her school -- until Nanno shows her a shortcut to success.

The head of the school soccer team is filled with envy when Nanno becomes her co-manager, and her resentment begins to manifest itself in eerie ways.

In a school that ranks its students in order of beauty, Ying is mortified when Nanno outranks her, and goes to extreme lengths to reclaim her spot.

Hann has a girlfriend, but he becomes a social media sensation at school when he gets mistakenly linked to Nanno, and he really enjoys the attention.

While hiding from an escaped murderer terrorizing their school, a group of students and their teacher soon begin to turn on one another.

When an elite girl's school starts accepting boys, Nanno pushes against strict rules that discourage boys and girls from interacting.