“Love Letter” by Ozaki Kaori. It’s a short and bittersweet story.
If you want sad oneshots, works by Avogado6 are quite amazing. Simple art but with ample message.“Shii-chan” is one of them.
Another oneshot is “My Wife Whom I Loved Dearly” by Takeda Toryumon.
"this witch of mine" i love this one sm!!! the ending is sad but sort of bittersweet i def recommend
https://www.mangago.zone/read-manga/this_witch_of_mine/
thank u!! i actually read this before and i agree it’s super good and def made me cry
thank u! i haven’t read love letter yet but i will now! i have read the other recs before and they def did make me cry
any super sad mangas with good art style recommendations that’s preferably short but if the story is good like tpn or demon slayer lmk (๑•ㅂ•)و✧