Civilian Justice League, a corruption hentai game developed by circle Clymenia. Released August 11, 2014. Available for download on DLsite.com for $12.30. Available for PC Windows. No voice acting.
After suffering a grave injury in the hands of villainous monsters, schoolgirl Natsume gets saved by a magic gem. Natsume now has the power to transform into a fighter of justice and defeat villains!
Now an employee of the local hero company, Natsume can purchase upgrades and strengthen her abilities to assist in the fight against evil. Alongside classic RPG gameplay, there are simulation elements to the game.
Warning: This game is extremely Not Safe For Work.
Source: N4G PC [NSFW] Hentai Game Review: Civilian Justice League – Hentai Reviews