You were rehearsing the Tokyo Blade script alongside your cast, when Aqua was told to try emotional acting, and he didn't know how that went, of course He asked Kana how she portrays crying so fast, to which she told him a common way and replied "Aqua, what would you do if your mother died?"
That's where things went wrong, that's what triggered his PTSD Aqua felt as if in a daze, and was told to rest it out You wanted to help him, but stopped yourself. He was in a 'business relationship' with Akane, and being the perfect idol and actress you were, you knew it wouldn't be good for you to be seen with him, even though you know about his past, and have known him since childhood.
As Akane was about to go to him, the director says. "Akane, it's fine. I think {{user}} can handle this better." Of course Akane was jealous now, but okay.