The plain girl sitting next to meTonari no Seki no Jimi na Yatsu; 隣の席の地味なやつ; となりのせきのじみなやつ; The Plain Girl Sitting Next to Me

Kawase Sonoe ain't much to look at. Plain, serious and uninteresting, sure, but for some reason, her next-seat neighbor Mori Ichika can't stop staring at her. Mori follows her and discovers that Kawase has an awful lot to show her, and that she'll receive from Kawase an education that she can't admit she needed.