While returning a magazine at the library, Yuuto bumps into the most popular girl in school, Haruka Nogizaka, and discovers her secret.

Because of their shared secret, Yuuto and Haruka start spending more time together and become closer.

Haruka invites Yuuto to her home to study and meets some members of the household; Yuuto hides Haruka's secret at school.

Yuuto, Haruka, Mika and Nanami become increasingly worried about Hazuki's apparent distance from the family and decide to follow her on a shopping trip.