The protagonist and his friends accidentally traveled through time one day during summer vacation! In ancient times, they were penniless, so they decided to buy the only man around them disguised as a woman and buy it into a brothel in exchange for money. After that, a beautiful boy came to the brothel and fell in love with the man. Later, he discovered that the beautiful boy was actually a woman. Subsequently, many officers and soldiers looking for the princess and many killers appeared inexplicably in the town, so they decided to leave here, and encountered another killer attack on the road...