Reading progress update: I've read 105 out of 192 pages.

Broken Angels, Volume 2 - Setsuri Tsuzui, Setsuri Tsuzuki

So we have predatory lesbian, "psycho" killer gay/bi man who dies a tragic death telling his lover to carry on.

 

Really it's hard to make out the characters because they all look the same and have similar hair colors and styles. This artist was channeling some CLAMP there.