Tachikawa Tetsuya is a first‑year student at a new high school, aspiring to become a master archer just like his late grandfather, Fudou. His dream is shaken when a transfer student joins the class, rumors had whispered that the newcomer would be a boy, but the new student turns out to be a cute girl named Sasaki Gonzaburou, whose gender identity is ambiguous and who carries a few small secrets.