Synopsis: 1 Ii ne de Skirt ga 0.1mm Mijikaku Naru Class no Jimi na Onnanoko: Gojitsudan-hen

Following the events of *This Plain Girl's Skirt Will Shrink By 0.1 mm For Every Like*, a collection of stories revolving around Plainy and Gal during their high school and university days. 1. Daigakusei ni Natta Jimiko to Gal (大学生になった地味子とギャル) 2. Iru Nokori de Ninin Sankyaku no Renshuu suru Jimiko to Gal (居残りで二人三脚の練習する地味子とギャル) 3. Gal to Machiawase-chuu ni Koe wo Kakerareta Jimiko (Sono 1) Daigakusei Hen (ギャルと待ち合わせ中に声を掛けられた地味子（その１）大学生編) 4. Gal to Machiawase-chuu ni Koe wo Kakerareta Jimiko (Sono 2) (ギャルと待ち合わせ中に声を掛けられた地味子（その２）) 5. Oyakusoku (お約束) 6. Gakkou Kaeri Issho ni Shitagi wo Minikita Jimiko to Gal (学校帰り一緒に下着を見に来た地味子とギャル)