how about asterisk? it' not yaoi but shounenai.
I have tag, Long-haired guy always looks good in manga.
http://www.mangago.me/people/tag/2337/Long-haired+Seme/
http://www.mangago.me/read-manga/junjou_electric/ (more like a cute short story)
http://www.mangago.me/read-manga/teiou_no_amai_wana/ (longer hair but not shoulder length, still fun story... very active ^^)
http://www.mangago.me/read-manga/meikon/ (LONG HAIR!!! and sexy I enjoyed it)
http://www.mangago.me/read-manga/kimi_wo_watareba/ (fun, but sad too {not terribly sad though but still})
http://www.mangago.me/read-manga/akuma_to_issho/ (demon form has long black hair, but mostly short blond, still a fun read)
http://www.mangago.me/read-manga/ousama_game_takagi_ryo/ (uke had long hair but cut it and seme has longer than norm hair)
http://www.mangago.me/read-manga/dia_game/ (vampire, hunter, helper and betrayal its fun)
http://www.mangago.me/read-manga/hidamari_ga_kikoeru/ (may not have long Hair, but extremely good story ^^)
http://www.mangago.me/read-manga/hanaya_no_nikai_de/ (another really good story, also what got me into yaoi ^^, has depth)
http://www.mangago.me/read-manga/karamete_de_kudoite/ (pretty active, but fun in a way)
if u like these here's my list (still a work in progress but they are what I liked ^^):
http://www.mangago.me/home/mangalist/56720/
http://www.mangago.me/home/album/8942/?page=1
Lol ei weird potato. We have the same fetish? I had this great idea of storing them in an album because i'd love to stare at them every now and then. If you individually click the picture, you'll see the link of the manga http://www.mangago.me/home/mangalist/43249/
Can someone recommend me a yaoi that has a sexy long hair seme and good plot? i have a long hair-fetish. XD or any other shoujo or romance story that has a long hair Boy dude pleaseლ(´ڡ`ლ)