Ore no Imouto to Railgun Collaboration Project!

The Ore no Imouto to Railgun Collaboration Project! (俺の妹と超電磁砲のコラボプロジェクト！), translated as My Little Sister and Railgun Collaboration Project!, is an upcoming crossover fiction penned by Ore no Imouto ga Konna ni Kawaii Wake ga Nai author Fushimi Tsukasa.

Although not his first foray into fiction related to the Toaru Majutsu no Index universe, with his his short story, Toaru Bushitsu no Fanatic (とある部室の映像中毒(ファナティック)), translated as A Certain Clubroom's Fanatic appearing in Pseudepigrapha Railgun alongside Toaru Jihanki no Fanfare, where the characters of Index are treated as fictional characters, this story shows that both stories occur in the same universe.

It was first announced on Dengeki Bunko's channel on Nico Nico Douga.

Synopsis
One day Kirino is offered the job of having a live talk over Niconico Live with Mikoto Misaka a Level 5 esper from Academy City. "Maybe she'll introduce me to her little sisters if we get along.. ehehehe," so saying, she immediately accepts the job and visits the Niconico main office with Kyousuke but...!?