Something like this http://www.mangago.zone/read-manga/usagi_otoko_tora_otoko/ ?
i read one a while back but cant remember the title.. big twist.. the uke is the hulking tall one and the curte petite one is the seme i have been trying to find it for awhile now on spectrum nexus and here i think its a side story to another manga
this is a list of titles only i'm sure someone else can help you find the links
gogo kikaku
glamorous lip
april 4th
hikari to yami no logic
hyper love power
innocent maze
junk boys
(▰˘◡˘▰)
http://www.mangago.zone/read-manga/koitomo_/
though is next story continue from Katekyo
I'm wondering if anyone knows any good BL mangas with a significant height difference between the uke and the seme? Many thanks in advance!