• Book Name: GOKKO (NINOMIYA HIKARU) Manga
• Alternative(s): 「…ごっこ」; ...Gokko
• Genre(s): Adult Josei One Shot Romance
• Author(s): Ninomiya Hikaru
• Year 2009
• Status: Completed Download Manga
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Summary: A brother and sister play an incestuous game where they do perverted things to each other until one gives up.