New harem games are always welcome and I think this one may be worth to sub. Just need one or two updates to be sure of it.
Having said that, the MC was a bit hard to bear. I get he's being affected by those visions and it does makes sense story-wise, but it just feels like an obstacle. Not really fun. But I hope we can 'develop our control' and stop with that. It is a but of a turnoff when MC keeps making choices and taking actions I would not to as a player, being given the choice.
One thing I'm not sure though is if I may set a character in a 'bad path' if I choose not to 'check her future'. I guess this is the core mechanic of the sanity, but I'm not sure yet if I like it. Might be good, might be not.
Anyway, this is just a first impression thoughts. I will certainly be following this, it has a good overall setting.