I'm actually a little bit bummed that they didn't make her fully honest with him, and MC give her fully the space to be so. Like, it wasn't long ago she was calling out for him while gravely ill no? She obviously still has a spot for the guy back on earth in her heart, why pretend that she's ONLY looking at our MC? She can not be overlapping them, or using the MC as a replacement, but still have a spot left for Atsuhito as well, and our MC and any reasonable person would be understanding of that.
After hearing her cry out his name before, I'd actually be MORE suspicious IRL if she tried to pretend she was now suddenly completely over him and ONLY looking at me now. It doesn't have to be an all or nothing thing.
I am really glad that he's not her former lover from Earth though, and have the fear of suddenly becoming a different person one day out of nowhere.