パンプキンナイト
Spin-off
Pumpkin Night Gaiden: Naoko
Naoko: Pumpkin Night Gaiden· 尚子～パンプキンナイト外伝
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A spin-off prequel of Pumpkin Night focusing on the story of the character Naoko in her time in a mental institution.
Cameo
Kichikujima Dust Emperor
鬼畜島 ダスト・エンペラー
New "sacrifices" have wandered onto that island. After narrowly surviving a plane crash, they find themselves in an even deeper hell.