these are not retro but they are the saddest ones i know
https://www.mangago.me/read-manga/exchange_diary/
https://www.mangago.me/read-manga/kimi_to_tsuzuru_utakata/
https://www.mangago.me/read-manga/only_need_to_love_once/
https://www.mangago.me/read-manga/huijin_huayuan/
https://www.mangago.me/read-manga/chilblains/
https://www.mangago.me/read-m......
