Imos lives his peaceful life helping his sister Tori run a potion shop in a quiet village. However, when an order is given for all Ryuujin to hunt down the Evil King, that peace is shattered forever.

The world is threatened by monsters sent by the Demon Lord. To counter him, Dragons which are deities who reside in another dimension, bestow powers upon champions known as “Dracovalis”.

In a small, unremarkable village, Imos lives with his sister Tori, helping her run a potion shop. Along with his sister, he spends his days with his childhood friend (and a Dracovalis) Lotia, a gentle nun Krimina, and a tomboy princess Aina.

However, this all changes when an order is made for all Dracovalis, including Lotia, to hunt down the Demon Lord.