So I've seen the raws and read the summaries/translations and I have a theory.
What if Kagami is so turned off by Angelo that it's affected his scent and he doesn't know?
The first night he was out with Angelo Shingo could still smell Kagami's scent although it was decreased. However, since then he's been in near constant contact with Angelo and then shortly after goes home to Shingo. What if that is why the scent is gone? Because he hasn't had enough time away from Angelo to get his scent back?
I'm not sure Angelo is a cat so he can't tell. Kagami hasn't been in contact with other cats he knows or his brother. So the only one who has been near him lately that can smell him is Shingo.
Which is why Shingo thinks it has to do with Kagami not wanting him and then Kagami telling him that it actually has to do with the one who is smelling it so now Shingo and Kagami thinks it all has to do with Shingo not really wanting Kagami anymore.
When in reality it's because Angelo repulses Kagami to such a point he unconsciously hides his scent as deeply as he can to make it clear he's not interested and then its still locked down and hidden when he gets home to Shingo.
So I've seen the raws and read the summaries/translations and I have a theory.
What if Kagami is so turned off by Angelo that it's affected his scent and he doesn't know?
The first night he was out with Angelo Shingo could still smell Kagami's scent although it was decreased. However, since then he's been in near constant contact with Angelo and then shortly after goes home to Shingo. What if that is why the scent is gone? Because he hasn't had enough time away from Angelo to get his scent back?
I'm not sure Angelo is a cat so he can't tell. Kagami hasn't been in contact with other cats he knows or his brother. So the only one who has been near him lately that can smell him is Shingo.
Which is why Shingo thinks it has to do with Kagami not wanting him and then Kagami telling him that it actually has to do with the one who is smelling it so now Shingo and Kagami thinks it all has to do with Shingo not really wanting Kagami anymore.
When in reality it's because Angelo repulses Kagami to such a point he unconsciously hides his scent as deeply as he can to make it clear he's not interested and then its still locked down and hidden when he gets home to Shingo.
So it's all a misunderstanding.