神紅大学ミステリ愛好会の葉村譲と会長の明智恭介は、曰くつきの映画研究部の夏合宿に加わるため、同じ大学の探偵少女、剣崎比留子と共にペンション紫湛荘を訪ねた。合宿一日目の夜、映研のメンバーたちと肝試しに出かけるが、想像しえなかった事態に遭遇し紫湛荘に立て籠もりを余儀なくされる。緊張と混乱の一夜が明け――。部員の一人が密室で惨殺死体となって発見される。しかしそれは連続殺人の幕開けに過ぎなかった……！！ 究極の絶望の淵で、葉村は、明智は、そして比留子は、生き残り謎を解き明かせるか？！ 奇想と本格ミステリが見事に融合する選考委員大絶賛の第27回鮎川哲也賞受賞作！／第二十七回鮎川哲也賞選考経過、選評＝加納朋子 北村薫 辻真先
The original light novel that started the phenomenon!
In this fantasy world, everything's a game--and these gamer siblings play to win!
Meet Sora and Shiro, a brother and sister who are loser shut-ins by normal standards. But these siblings don't play by the rules of the ""crappy game"" that is average society. In the world of gaming, this genius pair reigns supreme, their invincible avatar so famous that it's the stuff of urban legend. So when a young boy calling himself God summons the siblings to a fantastic alternate world where war is forbidden and all conflicts--even those involving national borders--are decided by the outcome of games, Sora and Shiro have pretty much hit the jackpot. But they soon learn that in this world, humanity, cornered and outnumbered by other species, survives within the confines of one city. Will Sora and Shiro, two failures at life, turn out to be the saviors of mankind? Let the games begin...!
In the world of Disboard, everything is decided by games. Since arriving in this strange place, genius gamer siblings Sora and Shiro have risen to become king and queen of what's left of Disboard's humans. Their latest challenge is winning an unwinnable romance game against the races of Dhampir and Siren. To uncover the true strategy to beat this sadistic game of love, they head for the home of the angelic Flugel: the midair city of Avant Heim. But the Flugel are a hideously powerful race, created specifically to kill gods. Will things really go as planned?