I've been eyeing this one up. It's Hanako Games, isn't it? I'm expecting great things after Black Closet.
Apparently, Hanako Games is just publishing it. Tried it quickly yesterday evening, loving the art. As for the game itself, it's pretty much a "stat raising" game, similar with magical diary in that you decide what you'll do for the week to raise stats, then use those to "buy" an event with a girl along with the core story. There's a bit of randomization for each activity that can have one of three effects, which can apparently combo.
So yeah, don't expect something close to Black Closet gameplay wise, it seems to be very light on that matter, but I can feel it's going to be full of fluffyness.
As for how it'll differ from the source material, Hanako made a post on steam about that, saying they tried to keep as close to it as they could, while playing up the yuri side, improvising for some characters that weren't developped much in the book and discarded others. Haven't read the book, so won't be able to really judge how close to it it's gonna be.
