Danganronpa Another Episode: Ultra Despair Girls

Ultra Despair Girls takes place in between the events of Danganronpa: Trigger Happy Havoc (released 2010) and 2: Goodbye Despair (2012). It follows Komaru Naegi, an energetic but simple-minded ordinary high schooler who is the little sister of the first game's protagonist, Makoto Naegi. At the start of the Tragedy—a global societal collapse instigated by the terrorist organization Ultimate Despair, led by Junko Enoshima—Komaru is kidnapped by Junko's followers and confined to an apartment complex in Towa City, an artificial island created and administered by the conglomerate Towa Group. After one and a half years in captivity without knowledge of the outside world, her door is suddenly broken down by a murderous Monokuma robot. Komaru flees to the outside of her room and is saved by Byakuya Togami, a survivor from Trigger Happy Havoc and now an agent for the Future Foundation—a non-governmental organization aiming to restore the world from the effects of the Tragedy. Byakuya gives Komaru the Hacking Gun and orders her to flee, while he stays behind and fights the remaining Monokumas in the apartment.
As the outside city is attacked by swarms of Monokumas, Komaru is guided to an escape helicopter by Future Foundation agents. The escape is intercepted by Monokumas who abduct her and place her onbaord the Excalibur, a flying cruise ship where she meets Nagito Komaeda, a servant and slave working under the Warriors of Hope, a group of five children affiliated with an elementary school branch of Hope's Peak Academy responsible for the riots in Towa City, whose goal is to genocide all adults and create a utopia for children. They force Komaru to take part in the Demon Hunting Game—a death game where they will compete to kill her—and send her back into the city. Komaru finds herself cornered by Monokumas, but is saved by Toko Fukawa's alter, a serial killer named Genocide Jack. She soon reverts to the persecutory deluded Toko Fukawa, another survivor from the first game and intern at the Future Foundation who is infatuated with Byakuya. Although Toko takes a repulsive attitude towards Komaru for her airheadedness, they team up to venture into the city.
Throughout their exploration, Komaru and Toko fight the Warriors of Hope and learn of the traumas that led to their hatred of adults. Lil' Ultimate PE Masaru Daimon was physically abused by his alcoholic father; Lil' Ultimate Art Jataro Kemuri was berated by his mother to the point of extreme self-hatred; child actor Lil' Ultimate Drama Kotoko Utsugi was sexually abused by producers at the bequest of her parents; Lil' Ultimate Social Studies Nagisa Shingetsu was overworked and drugged by his parents to improve his performance in school; and Lil' Ultimate Homeroom Monaca Towa, the illegitimate child of Towa Corporation's president, was outcast from her family. The five kids planned to commit group suicide but were stopped by Junko, who taught them to hate and murder adults.
Komaru and Toko are aided by a seemingly friendly Monokuma named Shirokuma to an underground resistance, led by Towa family member Haiji; however, he rejects their help due to Toko's affiliation with the Future Foundation, who he despises. After an excursion to contact Makoto, Komaru and Toko return to find the resistance under attack from Monokumas. Despite casualties, they assist in repelling the ambush and Haiji agrees to help the pair.
Supported by the resistance, Komaru and Toko advance into the Warriors of Hope's headquarters. They fight and destroy a mecha controlled by Monaca and the Warriors of Hope's advisor, a Monokuma named Kurokuma. Monaca reveals that her true goal is to turn Komaru, the Ultimate Hope's little sister who defeated Junko, into Junko's successor by having her destroy the Monokuma controller that would detonate the bombs in the helmets brainwashing all of the other children in the city. Pressured by a vengeful Haiji and the Resistance who don't care that the brainwashed children will die, Komaru finally falls into despair when Monaca claims to have murdered her parents, but Toko convinces her to not give in. After a battle with a Godzilla-sized Monokuma controlled by the traitorous Shirokuma, Monaca is left alone under a pile of rubble whilst Komaru and Toko rescue Byakuya, who had been captured at the start of the game. To prevent the outbreak of another war and to search for the true fate of her parents, Komaru chooses to stay behind in Towa City; as a token of their friendship, Toko decides to join her. Monaca is rescued by Nagito, who promises to set her up as Junko's successor in order to birth a new hope through war and despair. Shirokuma and Kurokuma are revealed to contain an artificial intelligence of Junko's consciousness. Data chips of the two robots are taken by Junko's ally Izuru Kamukura, who uses these to attempt to start a killing game in Danganronpa 2. An image shown during the credits reveals that the other four Warriors of Hope have separated from Monaca and survived together.