The first season was released on August 8, 2018, on GMM 25. A second season was released globally on Netflix on May 7, 2021, which exposed the show to international fame. It has hit number one on the currently most watched Netflix shows in Thailand, Vietnam and the Philippines, while also ranking in the top 10 in countries around the world such as Brazil. The show has been critically acclaimed for the usage of unconventional storytelling and takes on modern high school society.
Premise
The plot revolves around Nanno, an enigmatic girl who transfers to different private schools in Thailand and exposes the students and faculty's stories of lies, secrets, and hypocrisy. Nanno on occasion lies to provoke others. She is revealed to be a mischievous immortal entity, punishing wrongdoers for their crimes and misdeeds. In Season 2, Nanno meets her match in newfound rival Yuri, who has a different, more revenge-focused ideology and wants to take over Nanno's duties.
Cast
Chicha Amatayakul as Nanno, a mysterious girl with supernatural powers and an enigmatic origin. Nanno serves as both guide and punisher to humans who hide secrets, perform harmful acts to others, and have selfish desires. Nanno is revealed to be an immortal entity that has the power to expose the lies and misdeeds of everyone she meets serving them the appropriate punishment no matter how big or small. Nanno is neither good nor evil in her crusade as she judges everyone equally, and while she feels no regret towards hurting people she only hurts those who have harmed others. She will however help those who are not inherently bad but are lost or trying to do better for themselves. Nanno prefers taking her time and planning how to deal with her marks before ending her mind games with satisfactory results. Nanno's outfit consists of her short medium-length, bowl-cut/bob hairstyle with bangs, female school uniform, and her inhuman-like cackle. She has similarities to the Junji Ito manga character Tomie Kawakami which was credited as an inspiration for the role, according to Amatayakul.
Chanya McClory (season 2) as Yuri, Nanno's rival. Yuri was originally a victim Nanno attempted to help after she was mistreated by two rich girls who blackmailed students, including Yuri, with sex tapes of her and others being raped. However, Yuri had already planned for revenge on the girls since her assault, and instead of listening to Nanno's advice she used Nanno as a sacrifice for her plan, hiring two men to assault and film the girls, in the same way Yuri was. Yuri's plan backfires however when the men also kill Yuri to hide their crime, drowning her in a bathtub that a bleeding Nanno was later placed in. Nanno's blood revived Yuri, giving her the same powers and immortality as her. Unlike Nanno though, Yuri prefers to spread chaos and get Nanno’s marks killed by others using lies and manipulation. Yuri shows signs of being sociopathic and has no remorse for her actions. Yuri's outfit is also a traditional female school uniform, with her hair tied in a ponytail using a red ribbon.
Each episode consists of individual stories and the appearance of Nanno at different schools.
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Original release date
1
1
"The Ugly Truth"
Pairach Khumwan
August8,2018(2018-08-08)
Nanno transfers to a school that boasts a spotless reputation, where she uncovers a predatory teacher who blackmails female students. She turns the tables by involving his own family.
The popular boys try to take advantage of Nanno, while the jealous girls decide to betray her. The group tries to bury their guilt, but they realize that getting rid of Nanno is impossible.
Mew is an average student surrounded by "geniuses" at her high school. Nanno helps her achieve instant fame through plagiarism, leading her into a spiral of paranoia and inescapable lies.
Dino is a working-class student pretending to be a millionaire to fit in with his wealthy peers. Nanno pushes him to throw a party at a fake mansion, forcing him into dangerous choices with his actual parents' money.
Hann, a student who already has a girlfriend, is forced into a fake relationship with Nanno to become a viral influencer couple. Social media pressure forces him to maintain the lie, destroying his real life.
The manager of the school soccer team, consumed by intense jealousy toward Nanno, discovers that the bathroom wall grants any written wish of hatred or revenge against someone else.
Absolute chaos erupts when the rest of the students discover the power of the wall. Everyone begins attacking each other anonymously, turning the high school into a physical nightmare.
Nanno meets TK, a kleptomaniac who steals to get the attention of his absent father. Unlike other episodes, Nanno bonds with him and forms a genuine human connection before teaching a lesson about loss.
A dangerous escaped killer infiltrates a school. Trapped inside a single classroom, a group of students and their teacher quickly fall into madness, distrust, and mutual violence while trying to survive.
The strict teacher, Ms. Aum, is heavily pressured by the school administration to change her teaching style. On the brink of a nervous breakdown due to personal issues, she takes drastic and violent measures.
In a girls' school that ranks its students on a literal beauty wall, Ying drops from the Top 10 after Nanno arrives. Obsessed with regaining her status, Ying resorts to extreme cosmetic methods.
A high school class reunites years later to open a time capsule. As they look back, tensions rise when Nanno reappears to bring to light a terrible past crime that everyone wanted to forget.
The dark truth behind the old school crime is revealed at the alumni dinner. The former classmates turn on each other in a bloody battle for survival and blame.
Nanno is joined by a schoolgirl named Yuri, who becomes immortal after meeting Nanno.
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14
1
"Pregnant"
Pairach Khumwan
May7,2021(2021-05-07)
Nanai is the most popular boy in school, known for impregnating girls and abandoning them. Nanno approaches him and, through poetic justice, makes him experience pregnancy in his own body.
In a strict all-girls school that has recently gone co-ed, romance is severely forbidden. Nanno sabotages the tech-driven tracking system and pushes a repressed teacher to break her own rules.
Minnie is a rich girl who causes a fatal car crash that kills four classmates. Thanks to her wealthy father's corruption, she avoids prison, but Nanno traps her in a psychological hell of guilt.
Note: This episode is also based on a true story called "Praewa and 9 bodies" (แพรวา9ศพ).
17
4
"Yuri"
Sitisiri Mongkholsiri
May7,2021(2021-05-07)
Nanno tries to help Yuri, a poor student mistreated by her wealthy friends. However, Yuri discovers Nanno's secret and orchestrates a violent betrayal that grants her immortal powers and a thirst for explicit revenge.
Kaye, a senior student, brutally hazes freshmen in a violent school initiation ritual. After getting expelled because of Nanno, he transfers to a new school where the roles reverse and he becomes the victim.
In a rigid institution where breaking rules leads to severe punishment, Nanno openly defies the system. Yuri intervenes to speed up the punishment, triggering an absolute student rebellion against the staff.
JennyX is a famous influencer tired of her parents exploiting her for money. Nanno helps her fake her death to escape, but Yuri ruins the plan, leaving Jenny completely identity-less and ruined.
Nanno and Yuri clash over the fate of Junko, a sick student, and her mother, who hides bloody secrets. Nanno begins to doubt her own moral judgments, weakening her powers ahead of a bloody climax.
The storylines in the episodes are inspired by actual real news reports where schoolgirls were victimized, but with the intent of showing how the victims will ultimately become the victor. For instance, "Minnie and the Four Bodies" was based on an incident where a student had crashed her car into a university van killing four people, and had avoided the consequences because of her family's wealthy connections.
"SOTUS" was also based on an incident where a senior punishes a junior for failing to follow the hazing rules, resulting in homicide.
Days before auditioning for the role of Yuri, Chanya McClory had just started recovery for having an operation for removing a brain tumor. Her determination to get the role won over the casting crew and inspired her to empower her character.
A Japanese remake starring Arisa Nakajima as Nanno started streaming on Fuji Television’s FOD platform on April 24, 2026.
The ad for the remake (collaboration with Wacoal) sparked a controversy for inappropriate use of suggestive language, with its advertisement featuring a female student unbuttoning her skirt in class.
Awards and nominations
Name of the award ceremony, year presented, category, nominee of the award, and the result of the nomination
