Petite and adorable teenage girl Elu-chan is striving hard to become an idol. She's been secretly working a part-time job outside school, but the nature of her work takes an unexpectedly adult turn. It seems she realizes that without proper sex education from her teacher, the path to idol stardom will be tough. Though initially hesitant and repulsed, Elu-chan gradually opens up to her teacher, eventually expressing immense pleasure. The natural progression of their teacher-student relationship is the highlight of this story.