Rihito Tatsuno

As the fourth-generation proprietor of the Koi Bathhouse, this honest and simple-hearted young man has shared a home with Ranmaru Mori for a decade. While he views Ranmaru as a reliable family member, he playfully dismisses the man's vampire identity as a mere joke. Though his innate purity and naive charm deeply captivate Ranmaru, his tranquil life faces a sudden complication when a romantic crush on his new high school classmate, Aoi, begins to stir.