YMMV / Root Letter

• Anti-Climax: The True Ending, where everybody finally met "Aya" for the first time, due to her simply appearing in front of everybody, and even then the plot in that route is majorly focused on her friends over her.
• Big-Lipped Alligator Moment: Selecting the "Special Attack!" Max Mode option during the final part of the Last Answer Epilogue for "A Government Plot" causes a short clip of a long-haired girl materializing a sword and slashing at the camera to play.
  • Crossing Paths requires you to find Four Eyes to find Dr. Fumino, except he's committed embezzlement and first needs to be hunted down, and then requires you to sell an item to help him put the money back before the money is noticed missing. This comes out of nowhere and isn't touched upon again afterwards, serving seemingly no purpose beyond getting the group together.
• Bizarro Episode: The Last Answer Epilogue for "A Government Plot" route, wherein the entire route was a manipulation of Max's memories, it turns out he was a part of the group of friends, and all of them were giant robot (G Gear) pilots that had gained powers after contacting alien blood and they formed a squad to fight off the alien invasion and Shiori is a 4th-generation clone of Aya.
• Complete Monster:
  • "Cursed Letter Route": Aya Fumino was once a brilliant young woman who, after her death, became a vengeful spirit tormenting others out of fury of dying young. Aya used a curse letter to hex her receivers and killing students in her former class and then trapping their souls in her world. A ritual was performed to keep Aya in check by using her as an alias to a random pen pal to appease her soul, but when Max broke the ritual by investigating the truth of Aya, Aya's spirit broke free and began killing again. Realizing she's bound to Shimane thanks to Max's letter, Aya decided to trick a former pen pal of hers into destroying the letters for her, before killing him afterwards and leaving Shimane to spread her curse all over their world.
  • "Princess of Himegamori Route": Professor Naoki Fumino is seen by the public as a respectable man, but underneath is a depraved abuser. Sexually abusing his daughter Aya for years while using his position to hide it, when Aya died due to his treatment, Fumino decided to target his other daughter Shiori by tricking her, using his wife's condition to have her move in with him, before sexually abusing her as well. When a number of her classmates found out what happened, Fumino decided to let them abuse Shiori as well for many years until graduation, laughing away believing he got away with it for many years until Shiori and Aya returned for revenge.
• Designated Hero: Most players have a hard time viewing the protagonist as the hero since he pushes people's buttons the wrong way sometimes and talks like a jerk when he called on Aya's friends by their nicknames, including one who is referred to as Chatty Bitch. Amusing way to poke at a friend, absolutely horrid way to refer to a stranger. Doubly so in Japanese, as bitch can also refer to someone who sleeps around. But others agree that the plot won't progress much if he didn't do what he had to do.
• Magnificent Bitch ("Princess of Himegamori Forest Route"): Shiori Yoshioka and her sister Aya Fumino were the abuse victims of their father, Profesor Naoki, who sought revenge on him. After Aya killed herself because of Naoki, Shiori became his next victim with her classmates joining in. Losing all hope for herself, she wished to be reborn, calling Aya's spirit to possess her and get revenge. Succumbing to her anger, Shiori joined Aya in a master plan to bring the most pain to their targets, first killing their father while disguised as a nurse and overdosing him, then deceiving and killing her targets while leading Misaki Murakami and Takayuki "Max" Nakamura into learning of the abuse to guarantee the survivors won't get away. Shiori, secretly wanting to be stopped, guides Max into freeing her and Aya from their torment and turns herself in to pay for her crimes.
• Moral Event Horizon: The Last Answer Epilogue for "The Princess of Himegamori Forest" path reveals that, in that timeline, Professor Fumino sexually abused both Aya and Shiori until the former killed herself and the latter was driven into despair. Even worse, when three of the guys in the group of friends caught the professor abusing Shiori, he bought their silence by letting them abuse her too!
• Values Dissonance: In the "Cursed Letter" ending, a boy mentions that he got the nickname Lettuce from his friends for being an herbivore. This references the Japanese concept of herbivore men, coined by the feminist writer Maki Fukasawa. It describes male individuals who have no interest in dating or building a family, and lack masculinity in relationships with women. The American term "soyboy" is somewhat, but not entirely similar. The term's peak popularity was in 2010, and it is less commonly known now.