I think you already know this manga, but when not:
http://www.mangago.me/read-manga/koi_to_wa_yobenai/
not really i always avoid a long story, but now that i feel like i wan to read a long story, thanks anonymous
It's technically Shounen-ai, but one of my all-time favorites if you haven't read it yet. (๑•ㅂ•)و✧
http://www.mangago.me/read-manga/never_understand/
It's about lost memory. Maybe you know it.
http://www.mangago.me/read-manga/mou_ichido_nando_demo/
anyone know a yaoi story that a little long but complete that has deep story about broken heart, or lost memory or revenge or one night stand or rich x poor or handsome x ugly? any recomendation is fine thanks beforehand