The Heartstring family was a royal vampire family like that of the other families that cover the world. The Heartstring and the Grim ruled Japan but never had the two ever came together. Until the day the son of Lord Heartstring became a monster, he had an unquenchable thirst that the vampires feared. Neo Heartstring was left too die in the suicide forest in Japan, but instead he embraced the nature and became an animal. That is until he met Kazuki, another vampire that wants to help Neo become a normal vampire again. But slowly Kazuki realizes he might be doing more than helping him. He's falling in love with him. Read as the romance between both vampires grow and they soon realize that with love comes more challenges. Do you think they can make it?