IDOLiSH7 (アイドリッシュセブン, Aidorisshusebun) or i7 (アイナナ, Ainana) is a Japanese rhythm game and visual novel mobile app released by Bandai Namco on both Android and iOS. The game launched on August 20th, 2015, and has surpassed over 2 million downloads since. It has been spread into many other medias, including; multiple manga adaptations, a novelization, and an Anime that's on its way!
Read more at Story
The story starts with Part 1, the player takes the role of Tsumugi Takanashi (小鳥遊 紡, Takanashi Tsumugi) the manager of the seven rookie idols of IDOLiSH7, as they embark on a journey through the entertainment world, gaining experiences and growing from the many challenges they face. Part 1 also introduces TRIGGER, their darker and sexier rivals, who are not without their own challenges.
On March 7th, 2016, the game updated with Part 2 of the story, which introduced the senpai idol group Re:vale and dug a little deeper into the mystery of Legendary Idol Zero.
Part 3 was released on April 27th, 2017. It is much longer than Part 1 and 2 combined and is said to be the climax of the story.  Part 3 also introduces an antagonist like group by the name of ZOOL whose motto is "Tetrarchy of madness and destruction."
Read more at Characters
IDOLiSH7's cast is mostly made up of idols, managers, production companies, and characters of that nature.
Despite IDOLiSH7 being a game itself. It does have other games! Some of its song and its own game skin can be found in the arcade game, Synchronica.
Read more at Anime
An anime adaptation was announced during a live broadcast on NicoNico Live on August 20th, 2016, the one year anniversary of IDOLiSH7. The live broadcast consisted of IDOLiSH7's Voice Actors, Sokichi Shimooka (supervising producer) and Ayaka Negishi (video game producer).
The anime will be released in January 2018.
The IDOLiSH7 Manga started on August 20th, 2015. The release of the game. It's written and illustrated by Arina Tanemura (種村 有菜, Tanemura Arina)
IDOLiSH7 is not your classic Manga per se as it does not consist of an actual story that goes across multiple chapters. It does consist of a short story different in each chapter.
On hanayumeonline you can read the most recent two chapters and the first chapter for free!
Released on the same date of the games (August 20th, 2015).
Original Work by Bandai Namco Online, Published by Hakusensha, Character Design by Tanemura Arina, Written by Tsushimi Bunta