From Sweet Indulgent:
Irresistible lure that leads him to his enemy's heart. The one who contributed the most to establishment of a new dynasty, he is "Igen" the bloody tyrant. His cruelty, which the world fears, drive him to massacre the Azukun clan for revenge from several years ago. The only survivor from a clan that suddenly became a traitor overnight is "Kasan" and he curses himself for surviving. He becomes a bath servant for Igen without knowing that Igen was one who orchestrated his family's massacre. Kasan slowly falls into unknown attractiveness from Igen, who he thought to be cold and distant.