Takuya Ichijo is just like a character out of a picture of the mundane – an ordinary high school boy you can find anywhere. However, his class includes someone who is far from ordinary, a beautiful girl named Shion Saegusa who used to be the center of a nationally popular idol group. She is always at the center of the class, still smiling like an idol even after her retirement, treating everyone without discrimination, and she’s the most popular person in the school. But whenever she shows up at the convenience store where Takuya works part-time, her behaviour is strangely suspicious for some reason. This is a somewhat unusual love comedy featuring a protagonist who describes himself as ordinary and a former nationally popular idol who acts suspiciously.