yoai with romantic and long story with good art. preferably completed

er well, my erotica list includes romance and steamy sex (it''s indicated) and i mentioned how long and if it's completed. (btw, i'm a fan of finished mangas) here http://www.mangago.zone/home/mangalist/50912/

Don't know if these will suffice but I find each & every story here very very romantic - http://www.mangago.zone/home/mangalist/26616/
But if u don't mind a bit more sinister form of love/a bit of darkness then u can try these out too - http://www.mangago.zone/home/mangalist/25771/
Romance Guaranteed! (at least it was, for me ;)