Elfin, a baker’s son, lost both his parents and was raising his nephew Ryui—the last keepsake of his older sister—all by himself. However, one day, it is discovered that Ryui is actually the son of the former King. Invited by the current King, Luciford, their lives flip from commoner life to living in a glittering Royal Castle!? Luciford kindly dotes on young Ryui to ensure he lacks for nothing. Not only that, but for some reason, he even begins to sweetly dote on Elfin as well——!!