
Actually this manga is good. Until now I don't mind rape scene or something like that. But i don't know why I feel disgusted with the rape scene in this manga. I hate that man but I hate that tatsuyuki too. If in the end you shoot him, why did you not shoot him at the beginning? His ass is too loose.. I prefer a clever yakuza like in viewfinder not a loose one..
Maybe I hate him because I have a high expectation with the story.. With a strong yakuza..

Did you actually read it? Tatsuyuki didn't intend to shoot Rogi. He was pushed to do it in self-defense.
Also, there are no yakuza in Finder.

He wasn't loose in my opinion tho. Tatsuyuki only cared about sex with Nozomi because he loves him. He felt nothing for Rogi, so having sex with him meant absolutely nothing to Tatsuyuki. That's why when he went to Rogi's place after he slept with Nozomi, he revealed his kiss marks in a way that suggested "Do whatever you want to me, but I'll never succumb to you". I think he's just the kind that can separe "having sex" to "making love" ╮( ̄▽ ̄)╭ Though, what Rogi did to him affected him emotionally even if he didn't want to show that (he suppresed his tears, but when Nozomi told him it's ok to cry after what happened, he did).
And he gives me the impression that he didn't shoot Rogi because he wanted "a fair match" with him "between men", using only fists, but Rogi thought that was just naive of him - they are yakuzas afterall.
Furthermore, in the end Tatsuyuki had the occasion to shoot him, but he was too soft hearted and he also seemed to pity that bastard, so in the end he missed. But I feel like he missed because the one involved was himself (he seems to care about others more than his own personna) . I'm sure that if Nozomi were involved, he wouldn't hesitate to shoot Rogi no matter how much pity he felt for him because the anger would have been soooo much bigger if the one he cared about were in his place (Nozomi, for example, would have killed that douche if it weren't for the daughter) ^.^
Haha sorry for such a long message, but I just wanted to speak my mind ^.^

This is a shoujou manga or shounen Ai manga? Is there a real couple? Confession? Kiss??

Shounen ai but in a 'cockblocked by censors' way like how Xena and various other 'coded gay' series went.
So you get declarations of 'like/love' and wanting to be with them for always, dying together because they can't live without the other other and so forth. So the subtext is definitely for there for us to textually accept their relationship as canon.

The author wrote Silver Diamond with the intent of it being a Shojo manga. Some characters--namely the two main protaganists--are very close relationally to each other. That is how the author wrote the characters. They were not intended to be actual couples. However, the author does not mind it when fans consider them shonen-ai couples.
Can you share link about the min story?
I mean main story