Hanayome wa juunanasai
crossdressing uke:
http://www.mangago.me/read-manga/udagawachou_de_mattete_yo/
http://www.mangago.me/read-manga/kasougenjitsu_ren_airon/
http://www.mangago.me/read-manga/henshin_dekinai/
http://www.mangago.me/read-manga/maid_in_heaven/
http://www.mangago.me/read-manga/goshujinsama_ni_kiwotsukete/
http://www.mangago.me/read-manga/wagamama_na_jewel/an/wagamama-na-jewel-chapter-2.html/7/
http://www.mangago.me/read-manga/umi_no_juunin_to_wa_koi_wa_shinai/
http://www.mangago.me/read-manga/hanamai_koeda_de_aimashou/
http://www.mangago.me/read-manga/cor_leonis_shishi_no_sinzou/ (ch.1)
seme crosdressing:
http://www.mangago.me/read-manga/secret_araya_miki/
http://www.mangago.me/read-manga/nise_x_koi_boyfriend/
http://www.mangago.me/read-manga/kawaisa_amatte_nanika_ga_hyakubai/tr/108563/page/106/
http://www.mangago.me/read-manga/bijo_tokidoki_yajuu/
http://www.mangago.me/read-manga/sayonara_boku_no_princess_lolita/
these mangas also have at least one scene where the uke crossdresses:
http://www.mangago.me/read-manga/love_stage/mf/v01/c002/8/
http://www.mangago.me/read-manga/mujihi_na_karada/mf/282767/Vol1_Ch65/pg-6/
http://www.mangago.me/read-manga/kanga_na_spoon/mrs/manga/kanga-na-spoon/v-1/6/46/
http://www.mangago.me/read-manga/leopard_hakusho/mf/v01/c001/26/
http://www.mangago.me/read-manga/kono_koi_wa_himitsu/tr/76373/page/24/
http://www.mangago.me/read-manga/honto_yajuu/mf/v05/c015.8/pg-4/
http://www.mangago.me/read-manga/hanayome_wa_oku_san/mh/175000/page/pg-17/
http://www.mangago.me/read-manga/bijo_tokidoki_yajuu/
http://www.mangago.me/read-manga/hanayome_wa_juunanasai/
http://www.mangago.me/read-manga/fudanshi_kun_no_honey_days/
http://www.mangago.me/read-manga/akihabara_fall_in_love/
http://www.mangago.me/read-manga/udagawachou_de_mattete_yo/
http://www.mangago.me/read-manga/umi_no_juunin_to_wa_koi_wa_shinai/
http://www.mangago.me/read-manga/smells_like_green_spirit/
http://www.mangago.me/read-manga/secret_araya_miki/
http://www.mangago.me/read-manga/kawaisa_amatte_nanika_ga_hyakubai/
http://www.mangago.me/read-manga/koisuru_maid_shounen/
http://www.mangago.me/read-manga/hanamai_koeda_de_aimashou/
http://www.mangago.me/read-manga/boyfriend_higuri_you/
http://www.mangago.me/read-manga/goshujinsama_ni_kiwotsukete/
http://www.mangago.me/read-manga/i_ren/
http://www.mangago.me/read-manga/kizudarake_no_airabuyuu/
http://www.mangago.me/read-manga/star_like_words/
http://www.mangago.me/read-manga/maid_in_prince/
http://www.mangago.me/read-manga/oh_my_maid/
http://www.mangago.me/read-manga/ayashi_kazokukeikaku/
http://www.mangago.me/read-manga/sailor_danshi/tr/97949/page/34/
Name some it would be very helpful to me :)