Kusunoki's Flunking Her High School Glow-Up manga volume 3 features story and art by Mitsuki Mii.

Despite getting off to a rocky start, Kusunoki's friendship with Ririsa Hebikawa is going relatively well. Now that she's made her first female friend and her social skills are improving, high school swandom might really be within reach for this ex-ugly duckling. If only she were better at school--and a little less clueless… She invites Shizuki over for an at-home study session, which takes a bit more of a dramatic turn than she expected. All the while, Shizuki's high school dream life is facing ups and downs of its own. He runs into a combative new face…who claims to be Kusunoki's childhood friend!