The most ordinary story – Yui and Micky"s parents get married, making them stepbrother and stepsister. Everything seems normal and nothing ominous was foreseen, but… Micky is haunted by the ghost of a girl… or rather she forces him to help her get into paradise. And in order for her to reach it, Micky must obtain some energy that can be gained by "getting close" with his stepbrother – from simply holding hands to the most daring perversions.