No, no, no, if it was Inoue, Micchy would have confronted Kouta and asked "Did you kill Yuuya?" meaning it literally, and Kouta, assuming he meant it figuratively and wracked with guilt over his failure to find Yuuya, would've said "Yes."
This misunderstanding would then continue for ten episodes, with no other characters intervening in any fashion, or either of them going "Hang on, just checking, when I asked 'did you kill Yuuya', I was being totally literal, were you - ..." "Oh gosh, no, I was being completely figurative."
Then Kouta would find out that no, he did literally kill Yuuya, and he'd proceed to spend the next four episodes attempting to compel other people to kill him.