Sanzenkai Setsuna Husbando

Description \ Bio

He is a young man who washed up naked on the sandy beaches of the island. He was rescued by Rinne and begins living in the employ of the Ohara family as their servant. He claims to come from the future to save the world, but cannot even remember who gave him the mission. With a mysterious confidence and optimism, he continues to smash every tradition on the island. [From Anime News Network]