The spinoff is based on the Ayase route from the Ore no Imōto ga Konnani Kawaii Wake ga Nai Portable PlayStation Portable game, and will feature a revised and expanded version of the scenario that original author Tsukasa Fushimi wrote for the game.
Bandai Namco Games released the Ore no Imōto ga Konnani Kawaii Wake ga Nai Portable PlayStation Portable game in 2011.
The novel is titled Ore no Imōto ga Konnani Kawaii Wake ga Nai Ayase if Jō.
Tsukasa Fushimi and Hiro Kanzaki’s original Ore no Imōto ga Konnani Kawaii Wake ga Nai (Oreimo) light novel series ran from 2008 to 2013.