Joon hyeok is preparing to pass the exam for level nine government staff. Since this is his third attempt, he is sure to pass the exam this time. He moved into a boarding apartment as part of his father's special measures to help his son with his studies. But what awaits Junhui in the luxurious house is not thick textbooks, but two free and unrestrained women. Joon hyeok began his cohabitation with the owner of a boarding apartment full of sexy beauties, Aqiong, and the nurse Dal lae, who exudes sexiness from his face and body. Since then, Junhui has started studying women every night instead of his books.
巧合的是，与妹妹特尼特（佐佐木三泽配音）相依为命的杰（铃木大遥配音）在100年后来到了世界。杰震惊地发现他们以前的豪宅变成了一所学校。就这样，杰把自己的名字从匿名改为神功四高玛，开始在学校学习，同时寻找回到过去世界的方法。
德川幕府时期，刽子手拜一刀（田村正和 饰）深得主公信任，然以柳生备前（橋爪功 饰）为首的柳生一族觊觎大权，因此视武功高强的水欧派剑客拜一刀如大敌。
