I think polyphonica was nominated before on this thread but I'll just second the suggestion. Insani did a demo translation awhile back so the engine is hacked but the style of the language seems to be quite different from normal speech so there might be some translation difficulties.
Definitely have to say it was a refreshing read, it seemed more... poetic than other VNs. Also like the fact that its a kinetic novel, not the same recycled dating sim structure over and over (get a thing going with the heroine, once you're together expect some crisis, crisis is miraculously resolved, heroine falls even more in love, end of story). Plus, you get a deeper relationship than boy meets girl, falls in love, h scene, fin

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