Haruna from Denshi Tokusou Haruna, a light novel by No Future, however, this is her outfit from Heroines' Chord. Speaking of this game, I'm not sure if I want to try making Rinko Yanase, the girl has like four armor designs (two on heroines' chord, one on her light novel and one in a card game) and most of the time, she's missing her armor in the cgs.