Itoshi no Kanojo wa Kakure Otaku

Naruse, a high school teacher, has a beautiful girlfriend who is a manga artist by profession. They have been seriously dating for about five years, but even after all that time, he doesn't even know what kind of manga she draws. On the other hand, Neko, who is attracted to how Naruse looks with glasses, has a secret that she has not yet told...?

(Source: Flowers, translated)