You mean switching like this? http://www.mangago.me/read-manga/haikyu_dj_switch/
no I meant sexual roles like the uke can switch to seme and the seme can switch to being the uke.
Or here :)
http://www.mangago.me/tag/switch/
You're Missing a lot if you don't know about my list lol (kidding) (≧∀≦)
My seke list http://www.mangago.me/home/mangalist/33677/
thank you
does anyone know of any verse yaoi manga (the character's can switch roles)