I will talk about the thing I bet people will be complaining about. That is how Haruto dealt with the situation since he didn't tell Chizuru the truth. I do like when characters tell others about the truth since it doesn't need to be hidden, but here it works. Remember she is a Gate and we know if she found out that would send her into despair. Then don't go on saying "Haruto could just save her." because why would Haruto even want someone to fall into despair. Also afterwards she could have been saved, but she wouldn't be as happy. So Haruto did the right thing which was protecting her from falling into despair.
Next Time: I have no idea what's going on