Watch Online Free on Watchseries. Natsuki is a "monster hunter". Yasunori Mikado, who was sealed away by Abe no Seimei and turned into a grudge, was about to be revived. Natsuki notices Taitoku's existence and challenges him to a duel. However, Taitoku has his sights set on Natsuki in order to make Natsuki's mighty power his own!