Plainy and GyaruJimiko to Gal; 地味子とギャル; 1いいねでスカートが0.1mm短くなるクラスの地味な女の子 ー後日談編ー; This Plain Girl's Skirt Will Shrink By 0.1mm For Every Like -After Story-; Une fille Ordinaire et une Gyaru
A sequel to [i]This Plain Girl's Skirt Will Shrink By 0.1mm For Every Like[/i], comprising a collection of stories revolving around Plainy and Gyaru's life during their high school years and in university.