Inside System is working on an untitled new entry in its The Legend of Dark Witch series for unannounced platform(s) that is due out in Japan in 2018, and is holding a contest to design the costume that character Blad wears in the game.
The design must be uploaded via Twitter (or by Pixiv, but Twitter is preferred) by May 20 at 23:59 JST with the hashtag #魔神少女ブラッド衣装コンテスト. It may not include any adult, immoral, or copyrighted material. Multiple designs may be submitted. The winning costume design will be worn by Blad in the game. The winner will receive a product code to download the game on its release date, as well as appear in the credits and on the official website.
The latest entry in The Legend of Dark Witch series, The Legend of Dark Witch 3: Wisdom and Lunacy, launched for 3DS in December 2017.