The only resistance to the Harem Plan on Rito's end is grounded in an unwillingness to break the law; polygamy is outlawed in Japan, so a harem would go against it. A common justification for the Harem Plan given in response by the series' Devilukean characters - as well as its biggest enabling factor - is the sovereignty of the planet Deviluke over the Milky Way Galaxy and also perhaps the known universe: It is highly unlikely that its ruler - even if a foreign one - would be challenged given Deviluke's status as an intergalactic superpower. Thus, if Rito were to marry Lala and become its next king, then he would be diplomatically immune to Terran legal procedure; the laws of Earth would not apply to him, being null and void, essentially freeing him to marry whomever and however many he c