i would like to give a comforting answer, but from my point of view I think that Asami intends as betrayal something done against him completely. For example: passing secret information or other matters about his personal life to others. It's because of this that I think that the innocent Aki will have big problems in the next chapters. What if Asami thinks Aki is working as a "russian mole" or something like that (because of the bj with Sakazaki)?
Is Asami really all that adept at reading Aki? He says he is. He says that everything shows on Aki's face. But he often misreads Aki. So when you say that Asami assumes that Aki is "turning away" from him to turn to another, again, that's Asami totally misreading Aki. Aki has never "turned away" because he was drawn to another. He turns away to guard the intensity and confusion of his feelings for Asami. So old Asami isn't as insightful as he thinks he is. A good part of Aki's mind and motivations are still out of Asami's reach.
If I could give this one a double thumbs up, I would. Excellent observation!
Yes, it would be a "suspected plotting" until Asami discover the truth...and then god save Sakazaki. :)
Um, I think the translation of Asami's words " is there anyone besides me..." causes a bit confusion. Is it same sentence in English copy? In French and Japanese copy, Asami doesn't clearly mention that his competitors is person. Following Akihito's response, French translation goes competitors is person, but the original never says that. Asami rivals himself in Akihito's whole world and that's why Akihito's confession has big meaning for the story and why Asami says "erase them" things. It's only my speculation though.
Would you mind giving us a better translation? Please, I would like to understand better what Asami said. :)
Very interesting. I too would appreciate aby alternate translation you might offer or know of. If Asami asks if there is anything rather than anyone who can make Aki feel that way, then maybe Asami is a little more in tune with Aki and was just hurt that Aki would try to leave. (In my reading, I think Asami is right when reading people about 90% of the time, and I think that's great for someone without telepathy--but I know others will argue any error makes him bad). If Asami would "erase things" as you said, it makes a huge difference in how I interpret that scene. Thank you.
Totally agree with the 'expressive eyes' comment. And may I add: sensei is the Queen of subtlety. She has numerous 'silent' panels which looks and expressions convey more about what a character may be thinking than they would if that character actually had a line to say in the panel. This is particularly true for Asami (from whom we never get POVs). Example:
http://www.mangago.zone/read-manga/you_re_my_loveprize_in_viewfinder/mh/v07/c041/11/
I just love Asami's look and expression on the upper panel. It's the perfect combination of mild anger, disappointment at Aki's behavior and relief he's been finally found. It's like Asami's thinking: "Really kid? Did you really think you could run away from me that easily?"

Sensei YA's art often includes very expressive eyes (at least, I always interpret the glances and looks as meaningful). For the type of men who are not going to sit down and have a good long talk about their feelings (which, in my opinion, includes most men in this story if not the world), a lot depends on what is in the other's eyes. Asami seems particularly adept at reading Aki's face, and is most upset when Aki won't look him in the eye:
http://iweb9.mangapicgallery.com/r/newpiclink/you_re_my_loveprize_in_viewfinder/46/d312bacf993d5d6803215ab35e13335a.jpeg
Asami searches Aki's eyes for truth even as Asami establishes sexual and romantic dominance:
http://iweb6.mangapicgallery.com/imgfiles/you_re_my_loveprize_in_viewfinder/47/004.png
Asami may not like other people touching his things, but what seems more of an issue at this point is Aki turning away from Asami--by running away, by turning to another (in Asami's mind), or by not meeting Asami's eyes.
So, when Asami says, "Anyone who touches you, no matter who it is, I will erase them." Asami may not mean touch physically. Asami does not worry about people touching Aki to beat him up, and Asami didn't seem worried about what Fei did with Aki (though granted Fei is a special case and I doubt anyone else could get away with that). Maybe Asami is worried about anyone who touches Aki's heart and makes Aki turn his gaze elsewhere.
Just a thought. I'd still like to see Aki kick Sakazaki in the balls (my new favorite mental image).