If I remember correctly this manga was a drama or tragedy and was a oneshot.
The story was about a guy that wrote porn novels(uke) and was in love with his sister husband(seme). I think that he actually killed his sister or somehow was involved with her suicide, but I actually never really get the story (that's the reason why I want to re-read it xD)
Also I think his sister left him a suicide note, but he never wanted to read it. At the end he had sex with the other guy and I think the story implies that the sister husband always knew the other one was in love with him. The last pages kinda show the suicide note but I never get what was the deal with it....Yep we can say I didn't get the manga at all... 🤢

Oh yeah, also the uke said something like he always wanted to commit suicide with Schoenberg's Transfigured Night (I remember the song because I download it out of curiosity 😛 )

Any ideas?

"I exist, that is all, and I find it nauseating" -Sartre

It's Transfigured Night

Quote from Shuriken

It's Transfigured Night

What the .... o__o
You can't be serious XD That's the title!? I feel like an idiot, especially because when I was looking for it I pass that manga and didn't realized it was the one I was looking for T__T
Thank you so much anyway! ^^

"I exist, that is all, and I find it nauseating" -Sartre