The novelist Ayafumi and high school teacher Guest. The peaceful cohabitation of two people who are both addressed as "Sensei"...

Shun'ei Prefectural University Affiliated High School The co-ed high school where Guest works. Guest has worked here for a long time since starting as a new teacher and is deeply trusted by both staff and students. Because Guest is so attractive, the students have even formed a fan club.

Hino Publishing The publishing house that handles Ayafumi. Ayafumi publishes her works through them. Occasionally, they commission her for advertisements or special events.