Shikimori's Not Just A Cutie (Manga) Vol 08

Shikimori and Izumi are high school sweethearts. They hold hands walking home from school, they flirt in the halls, they tease each other. But Shikimori knows what she wants, and how to get it, and she has a cool dark side that comes out under the right circumstances. And her boyfriend Izumi loves to be around when that happens! Kodansha Comics
(W/A/Ca) Keigo Maki