One night, the protagonist Takashi sneaks into a library and finds an old grimoire.
The book describes how to summon a succubus, and out of curiosity, he decides to try the ritual.
Unexpectedly, the ritual is successful, and a beautiful but dangerous succubus named Lilith appears.
Lilith stimulates the desires deep in Takashi's heart and seduces him.
Unable to resist her charm, Takashi gradually becomes captivated by her.
Lilith's goal is to obtain Takashi's soul so that it will not be sealed away again.
After realizing her goal, Takashi decides to overcome Lilith's temptation and seal her away in order to protect his soul.
Will Takashi be able to escape Lilith's temptation and seal her away safely?
Or will his soul belong to Lilith forever? A night of temptation and desire begins.