I tried it, it's not bad, I suppose the dark plot is going to have to do with the mc's ex since she disappeared?
By the way I see that there is no "landlady" in the house so I guess there will be no M/S content, by the way if you plan to have B/S content, even if it's step-shit, it's better to put a patch or let the player select a relationship at the beginning of the game. (patreon TOS doesn't accept step either)
A question regarding Gen, does he have the hots for the mc? I couldn't help but think about that every time he blushed when talking to the mc...
All in all game look interesting, good luck.