Ore no koibito no hanbun wa junjou de dekite iru
If You Spoil Me That Much, I'm Gonna Cry
Norainu no Yoru
Stories with dark themes like this are not my cup of tea. But, after thinking it over I decided to appreciate it. The art is good. The plot twists. The characters make sense to me now, but they threw me for a loop at first. Main character and also the love interest both appear to be typical average upright citizens, but as the story progresses we see they have dark pasts and make decisions that good hearted protagonists would not make. This is not a miserable story, but it is not a story where the hero overcomes the darkness, progresses as a person, and experiences a healing love. Not one little bit.
PS: ABO-verse but doesn't really feel like it since we don't see much of those common themes with the main characters.
Almost Paradise