Did you read mangas from Miyamoto Kano (yaoi)? They are realistic.
Any genre? My personal recommendations are Annarasumanara, can't see can't hear but love, cheese in the trap and noblesse ╮( ̄▽ ̄)╭ don't have many bl recommendations cause the only ones I've read are never understand and 19 days. But someone says to me bl manhwa called "royal servant" and "a guy like you" are good.
Love story in manhwa feels somehow natural and more realistic. Though I still love my Manga...guess I'm having new interest now