Combination is a fiction-based fantasy with teen romance, drama and adventure all mixed in one. As Clover Phyllis turns sixteen, it started out as the best day of her life and ends as the devil of her nightmare by the one wish she should have never called out for. She came home that afternoon to find out from the news that there has been a leak from the core of the Earth and the only way humans of the planet could survive is to take the Bacalinine shot to go back in time for at least nine years and arrive back on Eartth as if nothing has happened. What clover didn't know was there are not only three types of worlds. It's not just past, present and future; there are also Shakespeare's time and Black and White days. With her foolish mistakes, getting in a trap and having to deal with complex relationships, will she be able able to fix the situation of why Earth has temporarily died?