Classmate no Moto Idol ga, Tonikaku Kyodou Fushin nandesu.

Saegusa, who retired from idolry when she went to high school, is good-looking and intelligent. She is always cheerful and friendly, and is the most popular person at school.

Takuya, however, knows a certain side of the highbrow Miss Saegusa.

Today, too, a suspicious-looking woman in a dubious disguise appears at the convenience store where he works part-time.
She is, in all likelihood, that Saegusa-san...?