YaoiTori <3

try a tagsearch for "seke" or "switching" - there are plenty!

thanks

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

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

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

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

http://www.mangago.me/read-manga/heart_no_kakurega/
http://www.mangago.me/read-manga/ze/

http://www.mangago.me/read-manga/star_like_words/
http://www.mangago.me/read-manga/puchitto_hajiketa/
http://www.mangago.me/read-manga/twinkle/
http://www.mangago.me/read-manga/gosan_no_heart/
http://www.mangago.me/read-manga/under_grand_hotel/
Each of the couples are open with their relationship. I also know some where they're not trying to be open, but people close to them know if that counts as "heaps".
I love all of these. The 5th does have rape though and it's not as lovey dovey as the other 4.