Have you read Pandora Hearts? It’s completed too and the art is beautiful
http://www.mangago.zone/read-manga/pandora_hearts/
http://www.mangago.zone/read-manga/life/
http://www.mangago.zone/read-manga/soul_cartel/
http://www.mangago.zone/read-manga/reincarnation_no_kaben/
http://www.mangago.zone/read-manga/an_uncomfortable_truth/
http://www.mangago.zone/read-manga/misu_misou/ (Legit balled my eyes out for this one)
http://www.mangago.zone/read-manga/tokyo_revengers/
http://www.mangago.zone/read-manga/nabari_no_ou/
http://www.mangago.zone/read-manga/ensemble_yubi/
Some of them arent action/adventure but they all had me crying at the end (〜 ̄△ ̄)〜
Recent updates of some manga are causing tears to us readers. Well, who wouldn’t crying after reading the death of one the characters you became fond of like in Kimetsu no Yaiba and Yakusoku no Neverland, to name a few. One of these days, I think I’ll be crying to Boku no Hero Academia too (but I hope I won’t). Anyways, can you recommend me some other manga which has the same feels as those that I mentioned? Something with great plot, character growth, some actions, and lastly with characters you can’t help but be attached with (then be killed....) <—- I know this one is kinda weird but because of this the manga becomes unforgettable for me and worth reminiscing like Koro-sensei from Assassination Classroom.