Royalty/Nobility/Actual Princesses:
http://www.mangago.me/read-manga/boukyaku_no_shirushi_to_hime/
http://www.mangago.me/read-manga/colette_wa_shinu_koto_ni_shita/
http://www.mangago.me/read-manga/sabaku_no_harem/
http://www.mangago.me/read-manga/niehime_to_kemono_no_ou/
http://www.mangago.me/read-manga/from_maid_to_mother/
http://www.mangago.me/read-manga/himitsu_no_himegimi_uwasa_no_ouji/
http://www.mangago.me/read-manga/zettai_heiwa_daisakusen/
Everything else:
http://www.mangago.me/read-manga/mitsuyokon_tsukumogami_no_yomegoryou/
http://www.mangago.me/read-manga/nagareboshi_lens/
http://www.mangago.me/read-manga/namaikizakari/
http://www.mangago.me/read-manga/kimi_wa_kawaii_onnanoko/
http://www.mangago.me/read-manga/mahou_tsukai_no_yome/
Hi guys can you all recommend me shoujo manga that male mc treat female mc like a princess!! Even better if it is reverse harem