pencil and story: Satoshi Urushihara

Fantasy-erotic series created by the great Urushihara, in his classic glossy style.
The protagonist of the story is a young vampire, Shion.
Vampires are considered good, while clients are evil demons.
Shion has an assistant, Rain, a little older than him, who he feeds on every day.
Only by drinking her blood and having sex with her can they both survive.
Clients instead kill their human prey.
In town there is a very powerful and famous client, Ashlin, a pop star.
Ashlin killed young Helen's parents and stole her voice.
Shion and Rain decide to help Helen.
Ashlin kidnaps the girl and Rain, to force Shion to submit.
Shion manages to defeat her, but Helen is injured and he makes her his assistant to save her.
Shion and the two girls reach a country village, where they are greeted by Artemis, a client girl.
They are invited to her villa, where the women of the village have to meet the village elders and other clients, going around naked.
Shion and Helen are drawn to another dimension, while Rain stays with the other girls in the village.