YES or YES

Official Description
"There's always more than one way to look at things, and there are multiple endings. The decision's all up to you."

Yes or Yes (stylized as YES or YES) is the third installment of HMS' TWICE Songfix Series, succeeding Dance the Night Away. It was written by Michael Williams, Belle Bello, Stefen and Stefan Sanchez on April 1, 2021. Amree Aguinaldo will star as Ingrid Yuikawa, with Cj Sanchez as Noah Dalton and Luci Sakuragi as Twix Fey, introducing Parker Trinh as Nash Huynh and Pauline Sui as Chienna Liu.

Plot
YES or YES begins with another new protagonist, this time being Ingrid, and is competing for the swimming medley relay in Silverfall, along with Ethan and two of her teammates. They win, and as a celebration for the success and Twix's early birthday celebration, they go to the renovated Witchville Square, Noah and Ingrid's favorite amusement park. While they're enjoying themselves in the said park, Rei Sotaro is being skeptical about how things are going well, and starts second-guessing the situation. Ingrid gets upset for her friend's unenthusiastic claims, and leaves him to his thoughts for a while, but decides to follow Rei's advice to go out of the park after having a talk with Noah, who sides with Rei.

The prodigies decide to leave the park, and when they do, they mess the exits up, and all the people in the park disappear as they get locked in. Rei shouts at Ingrid for not listening to him and blames her for everything, and Louise reasons with him, saying it's not anyone's fault. A timer of 3 hours counts down, and they go to the park's mirror maze for their first attempt at the puzzle, where they solved it. They head straight to the haunted house, where they found dead human bodies, and unfortunately for Nathan, where he was kidnapped. Because of this, Ingrid sets out to find her friend by herself, leaving the rest of the puzzle to Louise and Ethan. She stumbles upon a secluded cave under the haunted house as an abandoned extension, and Noah goes down with Ingrid to help her.

The two come across their missing classmates, Nash Huynh and Chienna Liu, handcuffed to the wall. While Noah lets them out, Nash points to a box saying that it could be a part of the puzzle in order for them to escape. The box's answer points to the mirror maze again, and when they go there, Ingrid was nearly stabbed by a knife if it hadn't for Rei and Noah who pushed her away. The mirror maze puzzle tells them to head to the park's willow tree, where they suspected Nathan to be buried. They dig him up only to find out he's still alive, but Hiro tasers the prodigies, and Hera holds Ingrid hostage. Hera makes Ingrid choose between her friend's lives or her own, and when Ingrid notices that Nathan's starting to wake up, she signals him to render Hera unconscious with a shovel. Ingrid tasers Hiro, and the others regain their strengths, tying Hera and Hiro down and goes back home with Nash and Chienna.

The nationals of the swimming medley relay commence, this time only between Karuizawa and Silverfall, where Ingrid and her swimming rival, Miles Matsuki, had a head-off. Ingrid was about to win first place while she's competing but notices that Miles is having trouble breathing. Ingrid tells him that she could help him win only if he cooperates and does his part. When they do, both schools win first place, because of Ingrid's good sportsmanship. The story transitions from the point of view of Ingrid to Rei's, ending the story with his closing narration.

Cast

 * Amree Aguinaldo as Ingrid Yuikawa, a young detective prodigy who spends half of her life taking care of her younger cousin, Twix.
 * Cj Sanchez is Noah Dalton, Ingrid's childhood best friend who helps take care of Twix, and rivals Rei's prosecuting skills when it comes to law.
 * Pauline Sui as Chienna Liu, a young student who wants to be an architect or an engineer when she grows up, and is almost as good as one.
 * Parker Trinh is Nash Huynh, a medical-lawyer prodigy who knows how to defend people against a social group in medical terms.
 * Luci Sakuragi as Twix Fey, Ingrid's young cousin who she considers as her niece, is a smart 4-year-old who can speak in multiple languages.
 * Parriss Bell is Hera Anastasakis, Ana's vengeful younger sister who dedicated her life to killing the prodigies to avenge Ana.
 * Haruto Miyano as Dr. Hiro Takumi, a young doctor handling most of the prodigies' class, and Ana's love interest.
 * Belle Bello as Louise Hillman.
 * Michael Williams as Rei Sotaro.
 * Stefan Sanchez as Ethan Morales.
 * Stefen Sanchez as Nathan Cortez.
 * Miles Matsuki
 * Ryder Dahilig
 * Emma Hartly

Trivias

 * MORE & MORE, DTNA, and YES or YES have 10 chapters in total; a prologue, 8 chapters, ending with the epilogue. The first letter of each chapter's name (excluding the prologue and epilogue) reads out its book title/initials: chapters 1-8 of MORE & MORE spell out "MOREMORE", Dance the Night Away has "DTNADTNA", and YES or YES' chapters spell out "YESORYES".
 * TWICE's DTNA was released on July 9th, 2018, which is Amree Aguinaldo's birthday. On a similar note, TWICE's YES or YES was released on Belle Bello's birthday, November 5. Ironically, Belle's counterpart, Louise Hillman, is the main protagonist of DTNA, and Amree's counterpart, Ingrid Yuikawa, is YES or YES' main protagonist.
 * The setting of all the stories is in Serene Cove, a small fictional city where the characters live in. It's mentioned that Serene Cove is a place in the States, but it was never specified where it could be. Although this is the case, it was hinted once by Ingrid in DTNA's ending that the sun sets on the east by Serene Sea's horizon, which means they're in a state by the left side of the United States map, namely the outskirts of either Oregon or California.
 * Ingrid Yuikawa is the only character to have more than one love interest. Though Rei Sotaro was explicitly shown to like Ingrid in YES or YES, it was already hinted in MORE & MORE and DTNA that they always have some sort of tension between them, and that both are often seen competing or bickering.
 * Stefen Sanchez, a writer of YES or YES, says that Rei liking Ingrid was a last-minute addition, unbeknownst to his co-writer and Rei's counterpart, Michael Williams.
 * A draft of YES or YES shows that the series will take a turn from murder-mystery and survival to supernatural, as Gavin, Briar, and Brandon will make an appearance as "ghosts" to help their friends out of Witchville Square after they died in Gloomwater Isle.
 * While he's helping Nash and Chienna, Noah states he was once in juvie (juvenile detention center) while he was staying in Europe. He never specified how he got in, but he most likely rebelled against his father into going back to Serene Cove for Ingrid, but got caught by the police instead.
 * Michael Williams admits that it was Amree who had the idea of the puzzles in YES or YES, despite not knowing what it's for.
 * MORE & MORE took place in either June or July, and DTNA is either July or August, since Brandon mentions that it's been five weeks after the epilogue as a time-skip. YES or YES took place in late February, because we witnessed Twix's birthday happening on the story, which is on February 24th.