A peculiar transfer student named Ougi Oshino has just arrived at Naoetsu Private High School. She is quickly introduced to senior student Koyomi Araragi by their mutual friend Kanbaru Suruga, in hopes of obtaining advice regarding a strange discovery she has made. After taking a look at the school's layout, Ougi notices that a classroom has appeared in an otherwise empty area—a place that should not exist. Unsure if this is the work of an apparition, Araragi and Ougi attempt to unravel the truth behind this enigma. But Araragi soon discovers, after finding himself locked in with Ougi, that the room holds the memory of an event he had long since forgotten. [Written by MAL Rewrite]

After swearing off music due to an incident at the middle school regional concert band competition, euphonist Kumiko Oumae enters high school hoping for a fresh start. As fate would have it, she ends up being surrounded by people with an interest in the high school brass band. Kumiko finds the motivation she needs to make music once more with the help of her bandmates, some of whom are new like novice tubist Hazuki Katou; veteran contrabassist Sapphire Kawashima; and band vice president and fellow euphonist Asuka Tanaka. Others are old friends, like Kumiko's childhood friend and hornist-turned-trombonist Shuuichi Tsukamoto, and trumpeter and bandmate from middle school, Reina Kousaka. However, in the band itself, chaos reigns supreme. Despite their intention to qualify for the national band competition, as they currently are, just competing in the local festival will be a challenge—unless the new band advisor Noboru Taki does something about it. From the studio that animated Suzumiya Haruhi no Yuuutsu, Kyoto Animation's Hibike! Euphonium is a fresh and musical take on the slice-of-life staple that is the high school student's struggle to deal with their past, find romance, and realize their dreams and aspirations.

With the help of producer Masaya Kaburagi, Aquamarine "Aqua" Hoshino and Kana Arima have landed the roles of Touki and Tsurugi in Lala Lai Theatrical Company's stage adaptation of the popular manga series Tokyo Blade. Co-starring with them is Aqua's girlfriend, Akane Kurokawa, who plays Touki's fiancée, Princess Saya. Due to the fanbase preferring Tsurugi as Touki's love interest, Saya has made fewer and fewer appearances in the manga, making it difficult for Akane to fully immerse herself in the role. Her struggles are compounded by differences between the play's script and the original work—differences that also frustrate Tokyo Blade's author, Abiko Samejima. Aqua, however, is more concerned with his personal goals than he is with the play. He has only one objective in mind: to grow closer to director Toshirou Kindaichi and find out what he knows about Aqua's mother, Ai.

Most people would prefer being the protagonist of a world full of adventure, be it in a game or in another world. But, unfortunately, a certain girl is not so lucky. Regaining the memories of her past life, she realizes that she was reborn in the world of Fortune Lover—one of the games she used to play. Unfortunately, the character she was reincarnated into—Katarina Claes—is the game's main antagonist, who faces utter doom in every ending. Using her extensive knowledge of the game, she takes it upon herself to escape from the chains of this accursed destiny. However, this will not be an easy feat, especially since she needs to be cautious as to not set off death flags that may speed up the impending doom she is trying to avoid. Even so, to make a change that will affect the lives of everyone around her, she strives—not as the heroine—but as the villainess. [Written by MAL Rewrite]