由于男主角（日和见日郎）要到姐姐（日和见纱和和）工作的地方居住，但到达后发现姐姐信中的地图作指的是山上的废屋，发现没有人居住的迹像后，便到山下的小镇寻找姐姐（日和见纱和和），在途中，建筑工地的吊塔吊著工字铁的吊勾突然松脱，主角（日和见日郎）为了救正要被工字铁压到的少女而舍弃了自己的生命，没想到少女正是山顶洋房的主人，而金发少女的父亲是立于所有怪物之上的王。故事就从公主每日与兄弟姊妹争夺王位之战开始了......
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