I have no idea what this is, but my first thought was Hachiman-lite and Yukino-lite.
Looks like a collaboration between the author of Henneko and Watari, so it might be worth checking out. I can’t say no to long black hair and thigh-highs. Now she’s just missing ribbons in her hair and the white stripe at the top of her so–oh wait, that’s just Yukino.
Release date is January 23, 2015.