Kyoko Hori, the most popular girl in her class, dresses plainly at home and takes care of housework. One day, Izumi Miyamura, the class loner, discovers her secret when he escorts her younger brother, Sota, home from a nosebleed. Hori discovers that Miyamura wears piercings outside of school and has tattoos, but the two decide to keep each others' secrets. They develop a close bond and friendship with each other as Miyamura continues to visit to play with Sota. During this time, Miyamura accidentally exposes his true appearance in front of Yoshikawa on his way to help Hori buy eggs during a flash sale...