Nera

Works from mika sadahiro
And check the link below
https://www.mangaupdates.com/series.html?category=Reversible+Couple

http://www.mangago.me/read-manga/hatsukoi_no_atosaki/

http://www.mangago.me/read-manga/kyuuso_ha_cheese_no_yume_omiru/

sequel of the one before:
http://www.mangago.me/read-manga/sojou_no_koi_wa_nido_haneru/

http://www.mangago.me/read-manga/heat_miyamoto_kano/

http://www.mangago.me/read-manga/onigari_no_mori_de/

http://www.mangago.me/read-manga/rules/

(there is more on miyamoto kano works, but I can't remember which ones)

http://www.mangago.me/read-manga/dog_style/

http://www.mangago.me/read-manga/metro_dog/

http://www.mangago.me/read-manga/hai_to_diamond/

http://www.mangago.me/read-manga/yabai_me_de_minna_yo/

http://www.mangago.me/read-manga/three_and_a_half/

http://www.mangago.me/read-manga/neji_no_kaiten/

http://www.mangago.me/read-manga/color/

http://www.mangago.me/read-manga/yume_no_kodomo/

http://www.mangago.me/read-manga/haru_wo_daite_ita/

http://www.mangago.me/read-manga/love_share/

http://www.mangago.me/read-manga/dare_ga_omae_wo_sukida_to_itta/

http://www.mangago.me/read-manga/shinu_hodo_suki/mf/v01/c008/

first story:
http://www.mangago.me/read-manga/renai_junkie/

first story:
http://www.mangago.me/read-manga/fascinating_summer_vacation/

http://mangafox.me/manga/tango_no_otoko/


those were the ones that I did read, you might find more here

https://www.mangaupdates.com/series.html?category=Reversible+Couple

reversible couples list of mangas is so short... :/

Finger stinger ch 3-4, metro dog, Kareshi glamorous first couple

thank you :-)