Do all of you know "the world of the feeling of Immorality Zero?" In this world, perform SEX almost as same as a person breathing routinely glub-glub. Be working, and, in the house, everybody crosses equally at any moment, and meeting starts the inside in large quantities, and do Akume. Even with whom who rolled up the passenger who rode on by the teacher of the school of the son, the subordinate of the company of the master, a train today see the habits of "the family whom there is" where it is natural what have sex.