Naked Sword and the Tree Peony of Black
Portrait (natsume Kazuki)
Life Senjou no Bokura
By My Side
Kyuuso Ha Cheese no Yume Omiru
Personal Favorites:
Old-fashioned Cupcake
Will You Let Me Stay Here? (On going)
Twittering birds never fly (this one has a movie too but the story is black and white and it's not on this website)
https://www.mangago.zone/read-manga/shima_chanchi_no_tsugaijijou/
https://www.mangago.zone/read-manga/boku_no_omawarisan/
https://www.mangago.zone/read-manga/the_secluded_sorcerer_wants_a_peaceful_life/
https://www.mangago.zone/read-manga/dekoboko_sugar_days/ (has a sequel as well)
https://www.mangago.zone/read-manga/his_little_amber/
https://www.mangago.zone/read-manga/intense_lee_kyung_ha/
https://www.mangago.zone/read-manga/on_doorstep/
https://www.mangago.zone/read-manga/midnight_rain_ctk/
https://www.mangago.zone/read-manga/fangs/
https://www.mangago.zone/read-manga/bongchon_bride/
https://www.mangago.zone/read-manga/koi_ga_ochitara/
https://www.mangago.zone/read-manga/contradict/
https://www.mangago.zone/read-manga/a_thousand_cranes/
https://www.mangago.zone/read-manga/papa_datte_shitai/
https://www.mangago.zone/read-manga/believe_my_sign/ (there’s slight color added here and there, likes the character’s eyes, but I think it’s a really nice detail)
https://www.mangago.zone/read-manga/unromantic/
https://www.mangago.zone/read-manga/chameleon_wa_tenohira_ni_koi_wo_suru/
recommend some black and white yaoi