Not sure if there is anything similar but we should have a self harm tag. drama or tragedy isn't good enough. It needs more of a warning for triggers.

I actually wanted to pop in here to say the exact same thing. Yuunagi Marbled should really have one, even if only for chapter 7. A couple of series in the past have brushed on the topic without necessarily calling for a tag, but it's a pretty graphic depiction in this case.