Reddit mentions of Vol. 1

uh, i'm like 9999% sure that cover is fanmade. They can't even spell "staff" correctly ("STTAF"), it's in spanish when there was no spanish boxart ever made, "cover design by anitaku", and "59 episodes", and hosted on deviantart. That's also a cover for ひぐらしのなく頃に解 (higurashi kai), the sequel to higurashi.

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• First full PC release of first game: himatsubushi hen
  
• PC release of second game, "kai"
  
• PC release of third game: "rei"
  
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• Region 4 anime vol1 cover
  
• Region 1 anime vol1 cover (by geneon) & Region 1 anime complete bluray (by sentai) releasing in 2016
  
• Region 4 anime vol1 cover of "KAI"
  
• japanese Anime dvd Volume 1 Limited Edition & Normal edition of volume 1
  
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  granted, some of the region 1 DVDs hint at it at least