This is one of the better Adult Games I've found lately... Or at least it has the potential to be. I've only played Nemu's route, but I enjoyed my time with it. I do hope it opens up though, it certainly seems like it should... I'll definitely get my community to take a look. ^_^
Though now that I decided to give the other MC a shot, you may want to tidy up the story when they should be in the same scene to match... Nemu gets way less info about town, as if you are meant to play the brother first. I played Nemu first and now it's jarring to see a lot more said even in the first scene with Hana that doesn't exist as Nemi.