“What would I do at a time like this if I were an adult…?” Have you ever thought that―?If Saori had her way, her big sister Iori would always be beside her―where she could just reach out her hand and they’d touch, open her mouth and they’d talk. But now Iori has a girlfriend. And a job. And a lot less time for her little sis. Somehow, whenever she can’t be with her sister, Saori finds her classmate Shizuku―even though they seem to oscillate between friend and foe, stranger and confidant. Who exactly is that girl to her…?