Description: A book found inside the tower. Its contents were about moonlight magic researching immortality. Moonlight magic, abnormally dense magical essence, the undead woman Nia met. All of them suggest the danger of this tower in the fog. 'Isn't this place dangerous? Wouldn't it be better to leave right away?' But Nia wants to go deeper into the tower as if guided by something. Nia saves Mano who was put in a lewd situation by the monsters attacking the airship and fell into crisis unable to do anything. Recognizing her strength and while feeling a slight unease, Mano sends Nia off. And in the deepest part of the tower. There Nia learns a shocking truth. Various kinds of monsters that infest the 'Tower in the Fog' wrapped in mist! While covered in semen, Nia and Mano press on toward the deepest part of the tower! What on earth is the true identity of the vanished sun...!?