Bless is a good one I'd say.
Thanks, and I agree! Bless and Blue Period are my favourites.
My absolute favorite have to be the Canis, Dear Hatter covers from the official eng copies. So colorful and bold!
Seven days
I have always loved the cover Sakura Gari and Itou-san (Kuraka Sui)
https://www.mangago.zone/read-manga/monster_and_ghost/
https://www.mangago.zone/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/
https://www.mangago.zone/read-manga/you_are_my_angela/
https://www.mangago.zone/read-manga/barefoot_angel/
https://www.mangago.zone/read-manga/innocent_sakamoto_shinichi/
https://www.mangago.zone/read-manga/innocent_rouge/
https://www.mangago.zone/read-manga/drcl_midnight_children/
https://www.mangago.zone/read-manga/kami_to_yobareta_kyuuketsuki/
https://www.mangago.zone/read-manga/the_concours/
(Japanese) mangas with the most gorgeous covers? It's okay if the covers are simple or if you think others might not find them that aesthetically pleasing. As long as you find them pretty I'd love to see them.