So far this story tears my heart the most. I wonder what'll happen next. Please let it be a good ending.

I'm getting a bit confused. Who is the one saying "I'm sorry I'm sorry I'm sorry"? Is that part of the flashback?

People on Pixiv have been calling on Katori to fix this case.

It's Kamine's, saying sorry for troubling him. But I wish it was from Gouda, just to make this less heart-wrenching.

monhan said:

[...]

It's Kamine's, saying sorry for troubling him. [...]

From the amount of sorries, it's almost as if Kamine was a younger Haguro.