It'll stay the same, you haven't finished someone's branch and thus can't continue.
I've finished it, maybe I'm in the wrong order in playing. Can I request savedata just after completing all branches?
There's no wrong order. Check other girls' journal, see what you haven't finished and do it. It should either say progress Mikasa's branch or that the branch is over for now. If it doesn't say that, you haven't completed it.
