Class no Idol Bishoujo ga, Tonikaku Kyodou Fushin nan desu (Associated Names)

Takuya Ichijo is an ordinary high school boy who seems to be the picture of mediocrity. That is Takuya Ichijo. However, in his class, there is a beautiful girl named Shion Saegusa, who used to be the center of a national idol group and is the opposite of ordinary. She is always at the center…