Kokoharuru

Theodore is a ruthless, arrogant duke known for his merciless rule. Despite his personality, women are easily swooned by him. He had a one-night stand with a woman and never contacted her again until they met again after 4 years with a young boy who was his spitting image.

Derek is a loyal and loving partner, but struggles with prioritizing his girlfriend over his childhood best friend, Rein. He's a tall, muscular man with green eyes and black hair.