Libitina: Unmasked

Official Description
Libitina: Unmasked is a psychological horror written by Parker Trinh, Belle Bello, Cj Sanchez, and Amree Aguinaldo, released on December 21, 2020. The characters were based on cast members, with Amree Aguinaldo as Illana Libitina, Cj Sanchez as Tanner Flynn, and Belle Bello as Seol Jaehee.

Plot
Seol Jaehee is given a task by her father, Dr. Seol Jaejin, to protect his locked journal at all times, and she tries to find the key to it to find answers. She and her friends are intrigued when another "Mariposa", a serial killer in Waverly Lane, is killing people, and she seems to be targeting the police force, especially the Chief of Police, Chief Tristan Flynn, who is also Tanner Flynn's father.

A dream came to Jaehee one afternoon which depicts a fight between her and Mariposa, who introduced herself as "Libitina" before stabbing Jaehee to death. Jaehee and her friends try to research and find out more about a person named "Libitina", and they come across the first adoptive family of Libitinas including Niana Libitina, and she says she's not Mariposa. The friends decided she is but kept it to themselves. Niana assures that she has another sister, but is dead.

Jaehee and her friends find Niana's sister's coffin that says "Iya Libitina", and opens the coffin only for Jaehee to find out that the skeletal remains in the coffin are that of a male's. Around the skeleton's neck is the key to the journal, and they decide to open the journal in a safe place, which is Jin's hideout near the outskirts of Waverly Lane. The journal reveals that Libitina is mentally ill and that she's the one who killed Jaehee's father. It also turns out that Libitina is Tanner's half-sister.

After knowing everything, Cateye, Niana's alias, ambushes the hideout with Fuego, and Mariposa, now revealed to be Illana Libitina. She, along with Cateye and Fuego, fights the group of friends, and Illana splits off to kill Chief Flynn in his house, forcing Jaehee and Tanner to chase after Illana and talk some sense into her. Tanner tells Illana that she was never forgotten by their mother and that she still loves her despite being a daughter of a rapist.

Tabitha Flynn reaches out to her daughter and says that she's been looking all over for her and that she regrets giving Illana away. Now knowing the whole truth, Illana gives in and agrees to be put in a mental institution to help cure her killing tendencies.

Cast

 * Seol Jaehee is Tanner Flynn and Skye Phillips' best friend who knows a lot about medical stuff, being the daughter of a late doctor. Jae is being played by Belle Bello.
 * Illana Libitina is the psycho killer with a mental illness, and she's the offspring of Tabitha and her rapist, making Tanner her older half brother. Amree Aguinaldo plays Libitina.
 * Tanner Flynn is Cardlin Sanchez Jr., and Tanner is the older brother of Illana, unbeknownst to him. He's the calm and collected best friend of Jae and Skye.
 * Skylar Phillips is played by Parker Trinh, and he's Jae and Tanner's best friend who wants to be a medical lawyer for Jaehee when she grows up.
 * Kenzo Grey is the smartest one out of all of them, being the valedictorian of his class every year. Kenzo is played by Michael Williams.
 * Sergei Austria is the clone of Sergio, who they thought died in a fire in the university lab. Stefen Sanchez plays Sergei.
 * Niana Libitina is Iya's younger sister, who is played by Shy Koumi, and she helps her adopted sister get her revenge by hiding behind a mask, receiving the alias "Cateye".
 * Sergio Austria is played by Stefan Sanchez, and Sergio is the base for cloning him in order to make Sergei, his android clone. He survives the fire in the university lab, and his alias is "Fuego".
 * Kazumi Sakura is played by Luci Sakuragi, and she's the 6 year-old multilingual toddler that Tanner babysits. Kazumi's father is Agent Dalton Jennings.
 * Zhou Yuna is Pauline Sui, and Yuna is the architect prodigy, a math genius, and also Kenzo Grey's girlfriend.
 * Cyril Quinn is an American singer from Nebraska who moved to Waverly Lane for her career and friends. She's played by Kaela Giddings.
 * Mason Campbell is played by Jace Blanchett, and he started as a child actor, and his mother is a reporter in Waverly News, Madeline Campbell.
 * Lim Jinho is Lucas Hale, and he's known as the tech expert in his friend group. His duty is mostly looking after their android friend, Sergei.
 * Amelie Cuoco is Parrissianne Bell, who is a news reporter in Waverly News with Madeline Campbell.
 * Dr. Kenji Katsaros is the friend and colleague of Dr. Seol Jaejin who is obsessed with studying Mariposa. He is played by Haruto Miyano.

Trivias

 * If the group were to debut as "Chrysalis", Libitina: Unmasked would be their first project, even though After Solstice is written a month before. Libitina's symbolism revolves around butterflies, and Chrysalis' logo is also a butterfly.
 * Despite its popularity, After Solstice wasn't qualified to be a debut piece since it's a fanfiction of two members. Just like RVLTN's debut project is the Silent pentalogy, even if Luna's Letters was written weeks before (and because it's a fanfiction between Belle and Stefan).
 * A possible sequel was teased in the book's epilogue, and the title card reversed colors with the first; from white writings and a black background to a white background and black writings.
 * The date written on the teaser was an error; it was meant to be on "December 2021".
 * The storyline was loosely based on Doki Doki Literature Club's spin-off game by Team Salvato with almost the same name.
 * Like most of HM's horror story originals, Libitina: Unmasked is a psychological horror, which means supernatural things aren't believed to be true, and the "horror" element actually comes from the person's mind.