AHHHHHTHIS IS AMAZINGG (I’m so happy I saw this since I had an idea of doing this also, probably won’t do it now but if I do I will now be able to credit you)
It's never confirmed that Mori sexually abused him, dude is terrified of Dazai; Mori literally found him after one of his attempts, and besides, it just doesn't fit his style. He would use manipulation or blackmail, but I'm pretty sure he never physically abused someone have you seen Yosano? The worst he ever did to her was manipulate her, he NEVER physically abused her before, and even if it had to be physical it either through another person or he wouldn't gonna do it😐
Dazai has absolutely no reason to be up there. He joined and left the PM at his own will, plus he would probably kill Mori before Mori even thought of touching Dazai.
I know, right😂 I can't believe that the fandom just assumed that Mori sexually abused Dazai when he was terrified of Dazai, like come on, man, how can you abuse someone you're scared of? And not only that Mori literally meets Dazai for the first time when Mori saves him from 1 of his suicide attempts (fun fact:Dazai canonly still have parents)