Responses

He’s apologising for ignoring her because he was scared that she had become like the others who were “unclean” due to their souls (as he can now see hers since she came back from her world).
He didn’t know that she had sent a bunch of letters because they never reached him. When he read those letters, he realised that she hadn’t changed and that it was wrong of him to ignore her, hence why he apologised.
I have no idea what is happening I thought I knew when I red ch74 but now I’m so confused. Why is he apologizing?