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|Play time||Medium (10 - 30 hours, 1 uncounted vote)|
|Links||Wikipedia (ja), Wikidata, VNStat|
|Shops||» JP¥ 1650 @ DLsite|
Nanus, the prince of Mamatoto has created a machine that is able to summon heroes from other universes. With their help he intends to explore an infinitely deep cave.