Moonstone is a Japanese visual novel studio known for creating adult-oriented bishōjo games. The founding members of Moonstone had once been members of Circus, a similar visual novel studio. After the establishment of Moonstone, a collaboration project between Moonstone and Circus was set up for Circus' game Suika AS+, and then another collaboration project between the two companies was set up for Moonstone's game Gift.
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Icha Pri! ~Ojou-sama to Icha Love Ecchi na Mainichi~
★ 6.7 · 2009 · MOONSTONE Cherry
Maji Suki ~Marginal Skip~
★ 7.4 · 2009 · MOONSTONE
Clear ~Crystal Stories~
★ 6.5 · 2008 · MOONSTONE
Clear
★ 7.2 · 2007 · MOONSTONE
Gift ~Niji-Iro Stories~
★ 6.3 · 2006 · MOONSTONE
Gift
★ 6.6 · 2005 · CIRCUS
Doko e Iku no, Ano Hi - Okaeshi Disc
★ – · 2005 · MOONSTONE
Doko e Iku no, Ano Hi
★ 7.2 · 2004 · MOONSTONE
Imouto Watashi, Donna Koto Datte...
★ 6.0 · 2003 · MOONSTONE
Ashita Deatta Shoujo
★ 7.2 · 2003 · MOONSTONE