At the lowest point in his life, Zevir accidentally finds a mysterious ring on the edge of a river.

The ring that changed his life completely, a Sucubus appeared when Zevir wore the ring, With a little explanation, the Sucubus named Lily forced Zevir to have sex and took some of his Soul Power from him.

With a system created by Lily, Zevir must keep his Soul Power from reaching 0 if he doesn't want to die.

A System Store that contains various kinds of equipment, items and accessories from another world, Zevir must start to face a big change in his life.