All recommendations are greatly appreciated ヾ(╹◡╹๑)
I'm looking for stories, which covers all these points ^^:

1. intense profound romantic story, better not to be a comedy
2. one of the main characters is brutal, towards his love interest as well (deliquent, yakuza, powerful, sadist etc.) *oh my, so perverted, really, can't believe myself 🤢 *
3. still, his love towards his love interest is one of the main themes
4. it would be great if this cruel person won't be a petty cheating drunkard, but a strong character

shoujo/shounen/yaoi/yuri <<- doesn't matter

What i have already read (mostly BL): Let Dai, Tenshi no Uta, Sakura-Gari. Maybe Hana yori Dango too ^_~.

Thank you!

Haou Airen read it a long time ago pretty sure it fits

All choices are made in fear,
What you fear more is the only difference.
Positive decisions are made in fear negative consequences,
Negitive decisions are made in fear of positive decisions not giving the outcome you want.
Embarrassment is the fear of people knowing your real thoughts.
Greed is the fear of having too little.

Demonblaze0's personal thoughts

Thank you for response ^-^ I have tried Haou Airen, pretty much raping and cruelty indeed ^-^, but it seemed too superficial for me.

I should add another oneshot: System of Romance. Though the guy is unbelievably too nice to be a real serial killer, but i liked this wicked fantasy ^-^.

How about Boys Next Door? It is a quite dark and mature shounen ai. I like the story, art, everything. It's one of my favorites and fits your request very well I think.

Oh yeah and don't worry about it being a oneshot. I think it is nicely executed and has depth.

"where ignorance is bliss, 'tis folly to be wise" - Thomas Gray

I recommend Bi no Isu. It seems to fit the Tags you mentioned. The Beginning is a bit harsh, and the Relationships is a bit off, but its clear that the seme loves his uke.

And the Seme is Yakuza ^^ 😉

I need a huge balcony, to talk to my people