Switching roles - yaoi

I second this recommendation, I also recommend

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

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

There’s also this one where the last couple switch roles. My fave couple and highly recommend :)
http://www.mangago.me/read-manga/like_a_tidal_wave_from_pheromone_shower/