Rihito Tatsuno

Currently, a 15-year-old high school boy. A supreme virgin who knows no impurity at the soul level. He is the fourth generation of the long-established public bath "Koi no Yu," which boasts a 60-year history. As a child, he happened to meet Ranmaru Mori, who was on the verge of death, and sheltered him at "Koi no Yu." Since then, he has developed a good relationship with Ranmaru, who became a live-in part-timer, but he is completely unaware that Ranmaru is preserving his chastity until he turns 18 to sip his living blood, thanks to which he has grown into an honest and naive young man. He thinks Ranmaru's honest confession, "I am a vampire," is a joke because he is quite naive.