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A circle consisting of three members, best known for their songs based on the popular, freeware horror game "Ib", called "「Ib」", "「Ib」-again-" and "「Ib」-forever-". However their arrange cover of "Matryoshka" has achieved great fame as well, as well as their original "Mea no Kyouiku".
In 2016 Kou uploaded two new videos to their YouTube channel as well as an album release "Kouringu". It is unclear if the group is back together or if Kou is using the channel for new works.
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