I just want a switch couple since I can't find any here.

http://www.mangago.zone/tag/seke/

http://www.mangago.zone/tag/switch/

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

http://www.mangago.zone/read-manga/haru_wo_daite_ita/
+sequel

why? don't you know my list?
http://www.mangago.zone/home/mangalist/33677/
also, you can check the community tags that mesperi linked but it comes with a warning that it'll be inaccurate.

OP, you should check it out, Takame has really good lists.

Dark heaven.