There are days when I think, if only I were an adult... The age difference is frustrating... Saori, the younger sister who always wants to meet and talk with her older sister Iori. But... Iori has a boyfriend, and due to work commitments, their schedules never align, which is tough for Saori... In such times, she often finds herself reaching out to Shizuku. What kind of presence does she hold for me, being a classmate as well...?!