I'm going to guess you stumbled into the sequel Winter Memories information, either just the ci-en blog stuff or the proper dlsite page for the sequel. Unless you missed Summer Memories Deluxe
This game, Summer Memories, has been the same it has been for a long long time. The next game, Winter Memories, is apparently close to being done but we still don't have a solid release date besides what's on dlsite but he appears to be ahead of schedule. There was a beta demo and a thread here if you want to look for it, but a proper trial version should be coming out "soon".
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= Summer Memories, original release
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= Summer Memories expansion, known as Deluxe or +
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= Winter Memories, entirely new sequel, not out yet.