Gakuen Onmyouji - Abe no Seimei, Koukousei. Onmyouji, Hajimemashita.

is a Japanese light novel series written by Kuroko Obana, with illustrations by Saku Ukai. The series began publication on May 10, 2016 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
This is a modern onmyoji dormitory!

Students who inherit the lineage of a famous family challenge a mysterious incident that occurs in the school!

The modern onmyoji dormitory "Uranoko Gakuen High School". The Kamo family, the Tomimon family, the Tamura family ... It is a school building where boys and girls who are the heirs of various famous families enjoy youth.

"Shunmei, call my name. Then the ties will move to you."

A rare onmyoji, the descendant of Seimei Abe, Haruaki Abe is an incarnation of the legendary demon Shuten-doji who terrorized Heiankyo. He happens to meet a beautiful woman, Hiiragi, and concludes a "blood contract" with her. It meant using Hiiragi as a shikigami and becoming the head of the Abe family ...

"Why Haruaki. You were the first to kiss when you became a high school student?" The school life with Hiiragi brought in the shadow of "Nine-tailed Fox" ...!? The school story begins!