http://www.mangago.zone/read-manga/holiday_love/ (Horrible male lead, but a realistic portrayal of struggle of marriage life)
http://www.mangago.zone/read-manga/karekano/
http://www.mangago.zone/read-manga/kimi_ni_todoke/
http://www.mangago.zone/read-manga/sensei/
http://www.mangago.zone/read-manga/gokusen/
http://www.mangago.zone/read-manga/kodomo_no_omocha/
http://www.mangago.zone/read-manga/mr_45_years_old_beast/
http://www.mangago.zone/read-manga/nineteen_twenty_one/
http://www.mangago.zone/read-manga/horimiya/
http://www.mangago.zone/read-manga/hotaru_no_hikari//
http://www.mangago.zone/read-manga/paradise_kiss/ (depressing)
http://www.mangago.zone/read-manga/nana/ ( Depressing, but realistic. The writer is sick so who knows if it will ever be updated)
http://www.mangago.zone/read-manga/kuzu_no_honkai_decor/ ( Depressing, horrible male lead, but realistic take on relationship)
http://www.mangago.zone/read-manga/getting_married_is_not_easy/
http://www.mangago.zone/read-manga/haru_no_noroi/
http://www.mangago.zone/read-manga/raise_wa_tanin_ga_ii/
I read a lot of romance manga, some with quick love and others slow simmering. So please recommend to me some of the most realistic portrayal of love. ps no trashy, selfish ML please. thanksss