any yaoi where the relationship starts off with some misunderstanding ?

Here you go:
http://www.mangago.me/read-manga/how_sweet_is_a_sugar_daddy/ (The uke thought that the seme was dating his best friend + is married)
http://www.mangago.me/read-manga/houtou_musuko_to_koi_no_ana/ (The seme thought that the uke, his first love, was a girl)
http://www.mangago.me/read-manga/love_stage/ (Lol same here too)

Here you go,

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

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

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

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