My Sister is an animated work produced by a Japanese animation company, adapted from the light novel My Sister. Although the title of the work contained the words " My Sister ", it was not actually a work for the general audience but for the ACG audience. Therefore, its storyline and ending might be influenced by the creators and producers. From the original novel, the ending of the work was still uncertain. The author, Naoshi Odo, has yet to publicly reveal the ending of his work, so we can't know if the ending of this work will be the same as the ending of the novel. Whether it was a novel or an animation, the ending was decided by the creator and could be influenced by various factors. We can only hope that the creator of the work can give us a satisfactory ending.