Gravely injured at a young age, Shiki Tohno was practically banished to a distant relative’s home, where he lived a peaceful life until one day, news arrives of his father Makihisa’s death. Shiki returns home to find his sister Akiha, who has inherited their father’s position, living with two maids. There, he begins a new chapter as the eldest son of the illustrious Tohno family, finding that a life of luxury doesn’t sit right with him. As the days pass, familiar sights of the past awaken fragmented memories. Then, one day, he passes by a monster in the shape of a human…