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The writer is finishing the last route right now. I think next month (March) could be a good estimate for the beta, and maybe April for the final release (but you can play it already in beta). 

As for other games without stat raising, Heileen 1-2 don't have that, Bionic Heart, Nicole has a beta version of VN mode, and both Queen Of Thieves and Planet Stronghold:Colonial Defense albeit are a RPG/CCG, they can be both played in "VN Mode" (story and choices only). Thanks