if we talk about tragedy Manga I think Tealeantless Nana is my favorite choice. Tragedy happens one after another and I still have not read the end of it. in anime, it has only one season.
Sorry, if ask but can you please look at my requests and tell if you have it?
https://www.anime-sharing.com/threads/request-211210-rj361498-tentacle-works-テンタクルワークス-賢者ちゃんとhな触手.1392118/
https://www.anime-sharing.com/threads/request-231104-rj01109498-takotubo-タコツボ-つくよヴィレッジ.1397470/
https://www.anime-sharing.com/threads/request-misotake-みそテイク-multiple-games.1404036/
The Mexashare links for parts 2, 3, 5, 7, 8, 10, 11, and 12 are dead.
The Rosafile link seems to be online, but for I can't download it.
Additionally, I can't download the file from KatFile or Rapidgator either.