*This work is serviced simultaneously in a 15-rated and a 19-rated version under the same title. Some scenes and story progressions may differ depending on the age rating, so please select your preferred rating before viewing. In the northernmost part of the Valdrasne Kingdom, a lonely mansion stands in the Forest of Dravenmoor. Once the estate of the Grand Ducal House of Drasken, it is now remembered only by the name of the single person left inside and the fear stained with blood. Isolde Drasken, the last surviving heir of the grand ducal family who lost all her blood relatives and was left alone. Kasvren Selvain has come to this desolate place, guided by a keepsake of the dead grand duke and an old letter. However... "There are numerous shadows in this mansion." Is what is hidden behind that indifferent face sorrow, or is it madness? Between the two people who kept their distance from each other in caution, what slowly seeped in was not just suspicion. "It is not that the heart has a soul, but that the soul makes the heart beat." "You are here, too." On a winter night when a blizzard completely traps the mansion, an unsolved secret grows alongside a wary affection. Truth always appears with the face of the fiercest contradiction.