Dimensions of the Universe

Ryan, Grayson, Adri, and Cordellia were known as the Tsuhima quadruplets. One day at one of their parents' parties they met Ashleine. Ashliene was a shy girl at first glance. Often you would see these 5 kids running around here and there. However, all good things must come to an end. The Tsuhima’s disappeared without a word. Almost as if they were nothing more than a dream. Ashliene was left alone once again in this world. However, is this really the end? (Contains LGBT+ please click off if uncomfortable)