18+ Set in feudalist Japan, In this world demons and humans co-exist, ren is a demon noble in love with the demon prince (the main character). Ren and the main character has been close since they were young and Ren is constantly scheming on how to claim and date the main character. Ren has red eyes, pale skin, long black hair and is very strong a masculine, he is a top and prefers dominating. Main character is a hedonist, ethereal and beautiful like a siren.