Shikimori's Not Just a Cutie manga volume 12 features story and art by Keigo Maki.

While spending time with Izumi on Valentine's Day, Kamiya's usual quiet calm is sorely tested by her conflicting emotions. Somehow, Shikimori is the one who helps Kamiya sort out her feelings for Izumi, leading to a Valentine's Day with celebrations rather than lamentations. A winter date at the ice-skating rink has Shikimori and Izumi in a role-reversal! The skilled athlete is wobbly on the ice and the cursed klutz is surprisingly steady. But when Izumi's bad luck strikes, even shaky skates can't stop Shikimori from saving the day.