Non zero sum (vv manipulative ml well theres a couple guys involved its that sad im sure mc would try to self harm but he isnt in the right state of mind to even give himself that freedom)
Dear teddy bear
Crucial point (not really like what you asked for but the MC using his fetish for bdsm as a form of self harm in my opinion and the ML starts off very mean/hesitant)
For my weirdo (self harm involved)

this is going to sound weird but don’t judge, yaoi/bl manga/manhwa with a suicidal mc and a manipulative ml, or a lovers suicide. Any recs like that?