maybe 15 chapters above?

http://www.mangago.zone/read-manga/blood_link/

I'm already currently reading that but what I'm looking for is manga :<

Finder series (You’re My Loveprize in the Viewfinder), Junjou Romantica, Sekaiichi Hatsukoi...

My fave long yaois:
http://www.mangago.zone/read-manga/fushidara_na_hanatsumi_otoko/
http://www.mangago.zone/read-manga/i_m_no_match_for_him/
My fave long shounen ais:
http://www.mangago.zone/read-manga/super_lovers/?H7c3
http://www.mangago.zone/read-manga/candy_man/

Old but gold
http://www.mangago.zone/read-manga/silver_diamond/
http://www.mangago.zone/read-manga/himegoto_asobi/
http://www.mangago.zone/read-manga/dear_green_hitomi_no_ounowa/

I have this list of long bl manga. Havent read them yet but went after good ratings! They are 10 ch+
http://www.mangago.zone/home/mangalist/817467/

http://www.mangago.zone/read-manga/umibe_no_etranger/

http://www.mangago.zone/read-manga/harukaze_no_tranger/
(sequel to umibe no étranger)

http://www.mangago.zone/read-manga/megumi_and_tsugumi/