The story follows 15-year-old Kaho Nikaidō as she leaves home to live in a high school dormitory. Almost getting hit by a truck, she is saved by a boy named Kanade Takahashi. She falls in love with him, only to discover that he is her landlord's son and a fifth grader.

Reads from right to left. First published in Japan in 2014 by Kodansha, Ltd., Tokyo.