7th

10 years where I loved you the most
( you need it to be pitiful right )
Itoshiki Ningyo
A painter behind the curtains ( my favourite)
Goshujinsama toke dama
Goodbye to destiny
Hogu Hagyeongsu ( Too dark )r*pe included
Kinai - Kemonohito Omegaverse
Nii_chan(harada) ///too dark paedophilia
Ai o Ataeru Kemonotachi
Usotsuki na tsugai
If you want more you can visit my list it’s called pitiful
Have fun

Ano Hi, Seifuku De, chapter 1, 6.5 (very very similar premise but there was hints on the extra that it ends happy)
https://www.mangago.me/read-manga/ano_hi_seifuku_de/

Last Portrait
https://www.mangago.me/read-manga/last_portrait/

Oops also forgot Hyperventilation, which was actually originally an animated bl!
https://www.mangago.me/read-manga/hyperventilation/