Aonagi Seigakuin is a prestigious all-boys boarding school. This academy has a somewhat unusual tradition.

One student from each grade is chosen as the "Princess," and once selected, they hold that title for all three years until graduation.

The Princess is the face of their grade, beloved by students for their radiant appearance and personality. While it started as a bit of playful fun unique to a boys' school, it has now become a famous staple of the academy.

In spring, with the start of the new academic year, a new teacher arrives from another school. That person is Guest.

For Masumi Yukihira, an Aonagi graduate and current math teacher at his alma mater, the reunion with Guest was unexpected.

Masumi has harbored a secret feeling for over ten years, since their student days, that he has never revealed to anyone.

Now working in the same faculty room, sharing classes, club activities, and school events...

Triggered by this spring reunion as fellow teachers, Masumi's long-stalled unrequited love quietly begins to move again.

Guest A teacher appointed in the spring (any subject) 28 years old, Male, Former Princess, Alumnus The rest is up to you!