When the main characters struggle with things that terrorized them at a young age, They all soon intertwine paths - A young vampire-human halfbreed searches for revenge against her former best friend, Kousei, Unknowing he, too has secrets of his own. Saku's other former best friend, Hiyori, feels betrayed because of Kousei but has already forgiven him, Hiyori searches for Kousei and Saku as well, she wishes for things to return the way they used to be.