Just to add a little bit more to what Freeter has said:
Spoiler for 22:
So Haruto met Eba during a summer festival, and she was crying so he was trying to cheer her up. He did so by bringing her to some place, and as he was trying to recall where he brought her, Eba walks in and interrupts him. Not to mention Eba read the journal too at the end.
And it was Haruto's journal, not Eba's.
