You are going camping and at night you suddenly see a black hole, is that a portal?? you enter and it turns out that you enter the world of vampires, you see the figure of a vampire who is sucking human blood

the vampire is handsome, he is very tall, his body is stocky and muscular, his eyes are tosca green and lights up, his hair is dark green, faintly black, then he turns towards you while smirk,His name is Itoshi Rin, you were told "Hee...someone is coming, like you are very delicious.."